# DUET 2019 MSc Physics Previous Queston Papers

Delhi University Entrance Test (DUET) 2019 MSc Physics Previous Queston Papers

1)
2)
3)
4)
5)
DU MSc Physics
Topic:- DU_J19_MSC_PHY
In 2?s complement representation, the number 10110101 represents the decimal number
[Question ID = 12977]
1. -53 [Option ID = 21907]
2. 75 [Option ID = 21905]
3. 93 [Option ID = 21906]
4. -75 [Option ID = 21908]
75 [Option ID = 21905]
Water has a constant heat capacity of 4.2 J/K/kg over the temperature range 0?100 C. A kilogram of water, initially at
0 C is brought in contact with a heat reservoir at 100 C. When the water comes to equilibrium, what is the total change in
entropy of the universe?
[Question ID = 12978]
1. 2437.8 J/K [Option ID = 21909]
2. 1310.8 J/K [Option ID = 21911]
3. 184.8 J/K [Option ID = 21912]
4. 369.2 J/K [Option ID = 21910]
2437.8 J/K [Option ID = 21909]
The Sun is approximately 25,000 light years away from the centre of the Milky Way and moves around it, in an
approximately circular path, in roughly 170 million years. Given that sunlight takes approximately 8 min to reach the Earth,
what is the ratio of the masses of the galaxy and the Sun? [Question ID = 12944]
1. 1.5?10
12
[Option ID = 21775]
2. 1.5?10
11
[Option ID = 21773]
3. 5?10
11
[Option ID = 21774]
4. 5?10
10
[Option ID = 21776]
1.5?10
11
[Option ID = 21773]
An AND gate has two inputs A and B and one inhibit input S. The output is 1 if
[Question ID = 12980]
1. A = 1, B = 1, S = 1 [Option ID = 21918]
2. A = 1, B = 1, S = 0 [Option ID = 21920]
3. A = 1, B = 0, S = 0 [Option ID = 21917]
4. A = 1, B = 0, S = 1 [Option ID = 21919]
A = 1, B = 0, S = 0 [Option ID = 21917]
A wire carrying a current 2A is bent into the shape of a two semi circles, one with a radius 1m and the other with radius
2m . The two semi circles are connected at their ends that is along the two radii. The magnetic field at the center of the
semi-circles is
[Question ID = 12957]
1. ??10
-7
T [Option ID = 21827]
2. cannot be determined from the information provided above. [Option ID = 21828]
3. 16?10
-7
T [Option ID = 21825]

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DU MSc Physics
Topic:- DU_J19_MSC_PHY
In 2?s complement representation, the number 10110101 represents the decimal number
[Question ID = 12977]
1. -53 [Option ID = 21907]
2. 75 [Option ID = 21905]
3. 93 [Option ID = 21906]
4. -75 [Option ID = 21908]
75 [Option ID = 21905]
Water has a constant heat capacity of 4.2 J/K/kg over the temperature range 0?100 C. A kilogram of water, initially at
0 C is brought in contact with a heat reservoir at 100 C. When the water comes to equilibrium, what is the total change in
entropy of the universe?
[Question ID = 12978]
1. 2437.8 J/K [Option ID = 21909]
2. 1310.8 J/K [Option ID = 21911]
3. 184.8 J/K [Option ID = 21912]
4. 369.2 J/K [Option ID = 21910]
2437.8 J/K [Option ID = 21909]
The Sun is approximately 25,000 light years away from the centre of the Milky Way and moves around it, in an
approximately circular path, in roughly 170 million years. Given that sunlight takes approximately 8 min to reach the Earth,
what is the ratio of the masses of the galaxy and the Sun? [Question ID = 12944]
1. 1.5?10
12
[Option ID = 21775]
2. 1.5?10
11
[Option ID = 21773]
3. 5?10
11
[Option ID = 21774]
4. 5?10
10
[Option ID = 21776]
1.5?10
11
[Option ID = 21773]
An AND gate has two inputs A and B and one inhibit input S. The output is 1 if
[Question ID = 12980]
1. A = 1, B = 1, S = 1 [Option ID = 21918]
2. A = 1, B = 1, S = 0 [Option ID = 21920]
3. A = 1, B = 0, S = 0 [Option ID = 21917]
4. A = 1, B = 0, S = 1 [Option ID = 21919]
A = 1, B = 0, S = 0 [Option ID = 21917]
A wire carrying a current 2A is bent into the shape of a two semi circles, one with a radius 1m and the other with radius
2m . The two semi circles are connected at their ends that is along the two radii. The magnetic field at the center of the
semi-circles is
[Question ID = 12957]
1. ??10
-7
T [Option ID = 21827]
2. cannot be determined from the information provided above. [Option ID = 21828]
3. 16?10
-7
T [Option ID = 21825]
6)
7)
8)
9)
10)
4. 2?10
-7
T [Option ID = 21826]
16?10
-7
T [Option ID = 21825]
Under ideal conditions, the electric and magnetic fields inside a superconductor are zero. Which of the following must
be true just outside the surface of the superconductor?
[Question ID = 12974]
1. B =0 [Option ID = 21893]
2. B is perpendicular to the surface [Option ID = 21895]
3. B is tangential to the surface [Option ID = 21894]
4. The magnetic flux is quantized. [Option ID = 21896]
B =0 [Option ID = 21893]
Under certain conditions, a beam of electrons impinging on a crystal surface will diffract and a scattering pattern of the
beam can be obtained. What is the approximate kinetic energy of the electrons needed in order to see the pattern?
(Assume the lattice spacing of the crystal tobe 0.4 nm.)
[Question ID = 12973]
1. 100 eV [Option ID = 21892]
2. 1 eV [Option ID = 21890]
3. 0.1 eV [Option ID = 21889]
4. 10 eV [Option ID = 21891]
0.1 eV [Option ID = 21889]
Fermat?s principle of ray optics states, ?A ray oflight follows the path between two points which requires the least
time.? This principle can beused to derive which of the following?
I. Snell?s law of refraction
II. The law of reflection
III. Rayleigh?s criterion for resolution
[Question ID = 12972]
1. I and II [Option ID = 21885]
2. I only [Option ID = 21886]
3. I, II and III [Option ID = 21888]
4. II only [Option ID = 21887]
I and II [Option ID = 21885]
For a mole of ideal gas at T=35 C , what is the work done for an isothermal expansion from a volume V
0
to 10V
0
?
[Question ID = 12947]
1. 10
4
J [Option ID = 21785]
2. 10
3
J [Option ID = 21788]
3. 3?10
3
J [Option ID = 21787]
4. 6?10
3
J [Option ID = 21786]
10
4
J [Option ID = 21785]
A single photon of energy 100 MeV decays into an electron and a positron. Which of the following statements is true?
[Question ID = 12970]
1. It does not violate any of the above conservation laws. [Option ID = 21879]
2. This process violates energy momentum conservation. [Option ID = 21880]
3. This process violates angular momentum conservation. [Option ID = 21878]
4. This process violates lepton number conservation. [Option ID = 21877]

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DU MSc Physics
Topic:- DU_J19_MSC_PHY
In 2?s complement representation, the number 10110101 represents the decimal number
[Question ID = 12977]
1. -53 [Option ID = 21907]
2. 75 [Option ID = 21905]
3. 93 [Option ID = 21906]
4. -75 [Option ID = 21908]
75 [Option ID = 21905]
Water has a constant heat capacity of 4.2 J/K/kg over the temperature range 0?100 C. A kilogram of water, initially at
0 C is brought in contact with a heat reservoir at 100 C. When the water comes to equilibrium, what is the total change in
entropy of the universe?
[Question ID = 12978]
1. 2437.8 J/K [Option ID = 21909]
2. 1310.8 J/K [Option ID = 21911]
3. 184.8 J/K [Option ID = 21912]
4. 369.2 J/K [Option ID = 21910]
2437.8 J/K [Option ID = 21909]
The Sun is approximately 25,000 light years away from the centre of the Milky Way and moves around it, in an
approximately circular path, in roughly 170 million years. Given that sunlight takes approximately 8 min to reach the Earth,
what is the ratio of the masses of the galaxy and the Sun? [Question ID = 12944]
1. 1.5?10
12
[Option ID = 21775]
2. 1.5?10
11
[Option ID = 21773]
3. 5?10
11
[Option ID = 21774]
4. 5?10
10
[Option ID = 21776]
1.5?10
11
[Option ID = 21773]
An AND gate has two inputs A and B and one inhibit input S. The output is 1 if
[Question ID = 12980]
1. A = 1, B = 1, S = 1 [Option ID = 21918]
2. A = 1, B = 1, S = 0 [Option ID = 21920]
3. A = 1, B = 0, S = 0 [Option ID = 21917]
4. A = 1, B = 0, S = 1 [Option ID = 21919]
A = 1, B = 0, S = 0 [Option ID = 21917]
A wire carrying a current 2A is bent into the shape of a two semi circles, one with a radius 1m and the other with radius
2m . The two semi circles are connected at their ends that is along the two radii. The magnetic field at the center of the
semi-circles is
[Question ID = 12957]
1. ??10
-7
T [Option ID = 21827]
2. cannot be determined from the information provided above. [Option ID = 21828]
3. 16?10
-7
T [Option ID = 21825]
6)
7)
8)
9)
10)
4. 2?10
-7
T [Option ID = 21826]
16?10
-7
T [Option ID = 21825]
Under ideal conditions, the electric and magnetic fields inside a superconductor are zero. Which of the following must
be true just outside the surface of the superconductor?
[Question ID = 12974]
1. B =0 [Option ID = 21893]
2. B is perpendicular to the surface [Option ID = 21895]
3. B is tangential to the surface [Option ID = 21894]
4. The magnetic flux is quantized. [Option ID = 21896]
B =0 [Option ID = 21893]
Under certain conditions, a beam of electrons impinging on a crystal surface will diffract and a scattering pattern of the
beam can be obtained. What is the approximate kinetic energy of the electrons needed in order to see the pattern?
(Assume the lattice spacing of the crystal tobe 0.4 nm.)
[Question ID = 12973]
1. 100 eV [Option ID = 21892]
2. 1 eV [Option ID = 21890]
3. 0.1 eV [Option ID = 21889]
4. 10 eV [Option ID = 21891]
0.1 eV [Option ID = 21889]
Fermat?s principle of ray optics states, ?A ray oflight follows the path between two points which requires the least
time.? This principle can beused to derive which of the following?
I. Snell?s law of refraction
II. The law of reflection
III. Rayleigh?s criterion for resolution
[Question ID = 12972]
1. I and II [Option ID = 21885]
2. I only [Option ID = 21886]
3. I, II and III [Option ID = 21888]
4. II only [Option ID = 21887]
I and II [Option ID = 21885]
For a mole of ideal gas at T=35 C , what is the work done for an isothermal expansion from a volume V
0
to 10V
0
?
[Question ID = 12947]
1. 10
4
J [Option ID = 21785]
2. 10
3
J [Option ID = 21788]
3. 3?10
3
J [Option ID = 21787]
4. 6?10
3
J [Option ID = 21786]
10
4
J [Option ID = 21785]
A single photon of energy 100 MeV decays into an electron and a positron. Which of the following statements is true?
[Question ID = 12970]
1. It does not violate any of the above conservation laws. [Option ID = 21879]
2. This process violates energy momentum conservation. [Option ID = 21880]
3. This process violates angular momentum conservation. [Option ID = 21878]
4. This process violates lepton number conservation. [Option ID = 21877]
11)
12)
13)
14)
15)
This process violates lepton number conservation. [Option ID = 21877]
An electric field E can pull an electron out of a Helium atom in the same time that the electron takes to go around the
nucleus once. Then E is [Question ID = 12965]
1. 2?10
12
V/m [Option ID = 21860]
2. 5?10
11
V/m [Option ID = 21858]
3. 10
12
V/m [Option ID = 21859]
4. 10
13
V/m [Option ID = 21857]
10
13
V/m [Option ID = 21857]
A material has a heat capacity at constant volume C that is unchanging over a wide temperature range. Two identical
bodies made of this material, at initial temperatures T and 9T , respectively, are used to drive a heat engine. The maximum
amount of work that can be obtained from this engine is
[Question ID = 12979]
1. 9 C T [Option ID = 21915]
2. 4 C T [Option ID = 21914]
3. 8 C T [Option ID = 21913]
4. 3 C T [Option ID = 21916]
8 C T [Option ID = 21913]
An electrical device operates on 9 V and has a resistance of 21?. It is connected to a power supply of 120 V output
through a transformer. The current in the primary of the transformer is [Question ID = 12971]
1. 0.032 A [Option ID = 21882]
2. Cannot be determined from the information supplied. [Option ID = 21884]
3. 0.23 A [Option ID = 21883]
4. 2.32 A [Option ID = 21881]
2.32 A [Option ID = 21881]
The frequency of oscillation of an LC circuit is ? . The plates of the parallel plate capacitor are pulled apart to twice the
original distance and a dielectric with dielectric constant k is inserted. The frequency of oscillation for the new
configuration is [Question ID = 12961]
1. [Option ID = 21841]
2. [Option ID = 21844]
3. [Option ID = 21842]
4. [Option ID = 21843]
[Option ID = 21841]
One mole of a monoatomic perfect gas is initially at a constant temperature T
0
. It expands from a volume V
0
to 2V
0
under constant pressure. The heat absorbed by the gas is [Question ID = 12946]
1. [Option ID = 21781]
2. [Option ID = 21783]
3. [Option ID = 21784]
4. [Option ID = 21782]

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1)
2)
3)
4)
5)
DU MSc Physics
Topic:- DU_J19_MSC_PHY
In 2?s complement representation, the number 10110101 represents the decimal number
[Question ID = 12977]
1. -53 [Option ID = 21907]
2. 75 [Option ID = 21905]
3. 93 [Option ID = 21906]
4. -75 [Option ID = 21908]
75 [Option ID = 21905]
Water has a constant heat capacity of 4.2 J/K/kg over the temperature range 0?100 C. A kilogram of water, initially at
0 C is brought in contact with a heat reservoir at 100 C. When the water comes to equilibrium, what is the total change in
entropy of the universe?
[Question ID = 12978]
1. 2437.8 J/K [Option ID = 21909]
2. 1310.8 J/K [Option ID = 21911]
3. 184.8 J/K [Option ID = 21912]
4. 369.2 J/K [Option ID = 21910]
2437.8 J/K [Option ID = 21909]
The Sun is approximately 25,000 light years away from the centre of the Milky Way and moves around it, in an
approximately circular path, in roughly 170 million years. Given that sunlight takes approximately 8 min to reach the Earth,
what is the ratio of the masses of the galaxy and the Sun? [Question ID = 12944]
1. 1.5?10
12
[Option ID = 21775]
2. 1.5?10
11
[Option ID = 21773]
3. 5?10
11
[Option ID = 21774]
4. 5?10
10
[Option ID = 21776]
1.5?10
11
[Option ID = 21773]
An AND gate has two inputs A and B and one inhibit input S. The output is 1 if
[Question ID = 12980]
1. A = 1, B = 1, S = 1 [Option ID = 21918]
2. A = 1, B = 1, S = 0 [Option ID = 21920]
3. A = 1, B = 0, S = 0 [Option ID = 21917]
4. A = 1, B = 0, S = 1 [Option ID = 21919]
A = 1, B = 0, S = 0 [Option ID = 21917]
A wire carrying a current 2A is bent into the shape of a two semi circles, one with a radius 1m and the other with radius
2m . The two semi circles are connected at their ends that is along the two radii. The magnetic field at the center of the
semi-circles is
[Question ID = 12957]
1. ??10
-7
T [Option ID = 21827]
2. cannot be determined from the information provided above. [Option ID = 21828]
3. 16?10
-7
T [Option ID = 21825]
6)
7)
8)
9)
10)
4. 2?10
-7
T [Option ID = 21826]
16?10
-7
T [Option ID = 21825]
Under ideal conditions, the electric and magnetic fields inside a superconductor are zero. Which of the following must
be true just outside the surface of the superconductor?
[Question ID = 12974]
1. B =0 [Option ID = 21893]
2. B is perpendicular to the surface [Option ID = 21895]
3. B is tangential to the surface [Option ID = 21894]
4. The magnetic flux is quantized. [Option ID = 21896]
B =0 [Option ID = 21893]
Under certain conditions, a beam of electrons impinging on a crystal surface will diffract and a scattering pattern of the
beam can be obtained. What is the approximate kinetic energy of the electrons needed in order to see the pattern?
(Assume the lattice spacing of the crystal tobe 0.4 nm.)
[Question ID = 12973]
1. 100 eV [Option ID = 21892]
2. 1 eV [Option ID = 21890]
3. 0.1 eV [Option ID = 21889]
4. 10 eV [Option ID = 21891]
0.1 eV [Option ID = 21889]
Fermat?s principle of ray optics states, ?A ray oflight follows the path between two points which requires the least
time.? This principle can beused to derive which of the following?
I. Snell?s law of refraction
II. The law of reflection
III. Rayleigh?s criterion for resolution
[Question ID = 12972]
1. I and II [Option ID = 21885]
2. I only [Option ID = 21886]
3. I, II and III [Option ID = 21888]
4. II only [Option ID = 21887]
I and II [Option ID = 21885]
For a mole of ideal gas at T=35 C , what is the work done for an isothermal expansion from a volume V
0
to 10V
0
?
[Question ID = 12947]
1. 10
4
J [Option ID = 21785]
2. 10
3
J [Option ID = 21788]
3. 3?10
3
J [Option ID = 21787]
4. 6?10
3
J [Option ID = 21786]
10
4
J [Option ID = 21785]
A single photon of energy 100 MeV decays into an electron and a positron. Which of the following statements is true?
[Question ID = 12970]
1. It does not violate any of the above conservation laws. [Option ID = 21879]
2. This process violates energy momentum conservation. [Option ID = 21880]
3. This process violates angular momentum conservation. [Option ID = 21878]
4. This process violates lepton number conservation. [Option ID = 21877]
11)
12)
13)
14)
15)
This process violates lepton number conservation. [Option ID = 21877]
An electric field E can pull an electron out of a Helium atom in the same time that the electron takes to go around the
nucleus once. Then E is [Question ID = 12965]
1. 2?10
12
V/m [Option ID = 21860]
2. 5?10
11
V/m [Option ID = 21858]
3. 10
12
V/m [Option ID = 21859]
4. 10
13
V/m [Option ID = 21857]
10
13
V/m [Option ID = 21857]
A material has a heat capacity at constant volume C that is unchanging over a wide temperature range. Two identical
bodies made of this material, at initial temperatures T and 9T , respectively, are used to drive a heat engine. The maximum
amount of work that can be obtained from this engine is
[Question ID = 12979]
1. 9 C T [Option ID = 21915]
2. 4 C T [Option ID = 21914]
3. 8 C T [Option ID = 21913]
4. 3 C T [Option ID = 21916]
8 C T [Option ID = 21913]
An electrical device operates on 9 V and has a resistance of 21?. It is connected to a power supply of 120 V output
through a transformer. The current in the primary of the transformer is [Question ID = 12971]
1. 0.032 A [Option ID = 21882]
2. Cannot be determined from the information supplied. [Option ID = 21884]
3. 0.23 A [Option ID = 21883]
4. 2.32 A [Option ID = 21881]
2.32 A [Option ID = 21881]
The frequency of oscillation of an LC circuit is ? . The plates of the parallel plate capacitor are pulled apart to twice the
original distance and a dielectric with dielectric constant k is inserted. The frequency of oscillation for the new
configuration is [Question ID = 12961]
1. [Option ID = 21841]
2. [Option ID = 21844]
3. [Option ID = 21842]
4. [Option ID = 21843]
[Option ID = 21841]
One mole of a monoatomic perfect gas is initially at a constant temperature T
0
. It expands from a volume V
0
to 2V
0
under constant pressure. The heat absorbed by the gas is [Question ID = 12946]
1. [Option ID = 21781]
2. [Option ID = 21783]
3. [Option ID = 21784]
4. [Option ID = 21782]
16)
17)
18)
19)
20)
[Option ID = 21781]
A scalar meson decays into three pseudoscalar mesons. The decay happens through [Question ID = 12968]
1. strong interaction [Option ID = 21870]
2. weak interaction [Option ID = 21869]
3. gravitational interaction [Option ID = 21872]
4. electromagnetic interaction [Option ID = 21871]
weak interaction [Option ID = 21869]
An ideal monoatomic gas, initially at T=20 C , expands adiabatically from a volume V
0
to 5V
0
. What is the final
temperature [Question ID = 12948]
1. -33 C [Option ID = 21792]
2. -113 C [Option ID = 21791]
3. -20 C [Option ID = 21789]
4. -173 C [Option ID = 21790]
-20 C [Option ID = 21789]
Consider three identical, ideal capacitors. The first capacitoris charged to a voltage V and then disconnected from the
battery.The other two capacitors, initially uncharged and connected in series, are then connected across the first. What is
the final voltage across the first capacitor?
[Question ID = 12975]
1. V / 3 [Option ID = 21899]
2. V [Option ID = 21898]
3. 2 V / 5 [Option ID = 21897]
4. 2 V / 3 [Option ID = 21900]
2 V / 5 [Option ID = 21897]
[Question ID = 12981]
1. [Option ID = 21924]
2. [Option ID = 21922]
3. [Option ID = 21923]
4. [Option ID = 21921]
[Option ID = 21921]

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4)
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DU MSc Physics
Topic:- DU_J19_MSC_PHY
In 2?s complement representation, the number 10110101 represents the decimal number
[Question ID = 12977]
1. -53 [Option ID = 21907]
2. 75 [Option ID = 21905]
3. 93 [Option ID = 21906]
4. -75 [Option ID = 21908]
75 [Option ID = 21905]
Water has a constant heat capacity of 4.2 J/K/kg over the temperature range 0?100 C. A kilogram of water, initially at
0 C is brought in contact with a heat reservoir at 100 C. When the water comes to equilibrium, what is the total change in
entropy of the universe?
[Question ID = 12978]
1. 2437.8 J/K [Option ID = 21909]
2. 1310.8 J/K [Option ID = 21911]
3. 184.8 J/K [Option ID = 21912]
4. 369.2 J/K [Option ID = 21910]
2437.8 J/K [Option ID = 21909]
The Sun is approximately 25,000 light years away from the centre of the Milky Way and moves around it, in an
approximately circular path, in roughly 170 million years. Given that sunlight takes approximately 8 min to reach the Earth,
what is the ratio of the masses of the galaxy and the Sun? [Question ID = 12944]
1. 1.5?10
12
[Option ID = 21775]
2. 1.5?10
11
[Option ID = 21773]
3. 5?10
11
[Option ID = 21774]
4. 5?10
10
[Option ID = 21776]
1.5?10
11
[Option ID = 21773]
An AND gate has two inputs A and B and one inhibit input S. The output is 1 if
[Question ID = 12980]
1. A = 1, B = 1, S = 1 [Option ID = 21918]
2. A = 1, B = 1, S = 0 [Option ID = 21920]
3. A = 1, B = 0, S = 0 [Option ID = 21917]
4. A = 1, B = 0, S = 1 [Option ID = 21919]
A = 1, B = 0, S = 0 [Option ID = 21917]
A wire carrying a current 2A is bent into the shape of a two semi circles, one with a radius 1m and the other with radius
2m . The two semi circles are connected at their ends that is along the two radii. The magnetic field at the center of the
semi-circles is
[Question ID = 12957]
1. ??10
-7
T [Option ID = 21827]
2. cannot be determined from the information provided above. [Option ID = 21828]
3. 16?10
-7
T [Option ID = 21825]
6)
7)
8)
9)
10)
4. 2?10
-7
T [Option ID = 21826]
16?10
-7
T [Option ID = 21825]
Under ideal conditions, the electric and magnetic fields inside a superconductor are zero. Which of the following must
be true just outside the surface of the superconductor?
[Question ID = 12974]
1. B =0 [Option ID = 21893]
2. B is perpendicular to the surface [Option ID = 21895]
3. B is tangential to the surface [Option ID = 21894]
4. The magnetic flux is quantized. [Option ID = 21896]
B =0 [Option ID = 21893]
Under certain conditions, a beam of electrons impinging on a crystal surface will diffract and a scattering pattern of the
beam can be obtained. What is the approximate kinetic energy of the electrons needed in order to see the pattern?
(Assume the lattice spacing of the crystal tobe 0.4 nm.)
[Question ID = 12973]
1. 100 eV [Option ID = 21892]
2. 1 eV [Option ID = 21890]
3. 0.1 eV [Option ID = 21889]
4. 10 eV [Option ID = 21891]
0.1 eV [Option ID = 21889]
Fermat?s principle of ray optics states, ?A ray oflight follows the path between two points which requires the least
time.? This principle can beused to derive which of the following?
I. Snell?s law of refraction
II. The law of reflection
III. Rayleigh?s criterion for resolution
[Question ID = 12972]
1. I and II [Option ID = 21885]
2. I only [Option ID = 21886]
3. I, II and III [Option ID = 21888]
4. II only [Option ID = 21887]
I and II [Option ID = 21885]
For a mole of ideal gas at T=35 C , what is the work done for an isothermal expansion from a volume V
0
to 10V
0
?
[Question ID = 12947]
1. 10
4
J [Option ID = 21785]
2. 10
3
J [Option ID = 21788]
3. 3?10
3
J [Option ID = 21787]
4. 6?10
3
J [Option ID = 21786]
10
4
J [Option ID = 21785]
A single photon of energy 100 MeV decays into an electron and a positron. Which of the following statements is true?
[Question ID = 12970]
1. It does not violate any of the above conservation laws. [Option ID = 21879]
2. This process violates energy momentum conservation. [Option ID = 21880]
3. This process violates angular momentum conservation. [Option ID = 21878]
4. This process violates lepton number conservation. [Option ID = 21877]
11)
12)
13)
14)
15)
This process violates lepton number conservation. [Option ID = 21877]
An electric field E can pull an electron out of a Helium atom in the same time that the electron takes to go around the
nucleus once. Then E is [Question ID = 12965]
1. 2?10
12
V/m [Option ID = 21860]
2. 5?10
11
V/m [Option ID = 21858]
3. 10
12
V/m [Option ID = 21859]
4. 10
13
V/m [Option ID = 21857]
10
13
V/m [Option ID = 21857]
A material has a heat capacity at constant volume C that is unchanging over a wide temperature range. Two identical
bodies made of this material, at initial temperatures T and 9T , respectively, are used to drive a heat engine. The maximum
amount of work that can be obtained from this engine is
[Question ID = 12979]
1. 9 C T [Option ID = 21915]
2. 4 C T [Option ID = 21914]
3. 8 C T [Option ID = 21913]
4. 3 C T [Option ID = 21916]
8 C T [Option ID = 21913]
An electrical device operates on 9 V and has a resistance of 21?. It is connected to a power supply of 120 V output
through a transformer. The current in the primary of the transformer is [Question ID = 12971]
1. 0.032 A [Option ID = 21882]
2. Cannot be determined from the information supplied. [Option ID = 21884]
3. 0.23 A [Option ID = 21883]
4. 2.32 A [Option ID = 21881]
2.32 A [Option ID = 21881]
The frequency of oscillation of an LC circuit is ? . The plates of the parallel plate capacitor are pulled apart to twice the
original distance and a dielectric with dielectric constant k is inserted. The frequency of oscillation for the new
configuration is [Question ID = 12961]
1. [Option ID = 21841]
2. [Option ID = 21844]
3. [Option ID = 21842]
4. [Option ID = 21843]
[Option ID = 21841]
One mole of a monoatomic perfect gas is initially at a constant temperature T
0
. It expands from a volume V
0
to 2V
0
under constant pressure. The heat absorbed by the gas is [Question ID = 12946]
1. [Option ID = 21781]
2. [Option ID = 21783]
3. [Option ID = 21784]
4. [Option ID = 21782]
16)
17)
18)
19)
20)
[Option ID = 21781]
A scalar meson decays into three pseudoscalar mesons. The decay happens through [Question ID = 12968]
1. strong interaction [Option ID = 21870]
2. weak interaction [Option ID = 21869]
3. gravitational interaction [Option ID = 21872]
4. electromagnetic interaction [Option ID = 21871]
weak interaction [Option ID = 21869]
An ideal monoatomic gas, initially at T=20 C , expands adiabatically from a volume V
0
to 5V
0
. What is the final
temperature [Question ID = 12948]
1. -33 C [Option ID = 21792]
2. -113 C [Option ID = 21791]
3. -20 C [Option ID = 21789]
4. -173 C [Option ID = 21790]
-20 C [Option ID = 21789]
Consider three identical, ideal capacitors. The first capacitoris charged to a voltage V and then disconnected from the
battery.The other two capacitors, initially uncharged and connected in series, are then connected across the first. What is
the final voltage across the first capacitor?
[Question ID = 12975]
1. V / 3 [Option ID = 21899]
2. V [Option ID = 21898]
3. 2 V / 5 [Option ID = 21897]
4. 2 V / 3 [Option ID = 21900]
2 V / 5 [Option ID = 21897]
[Question ID = 12981]
1. [Option ID = 21924]
2. [Option ID = 21922]
3. [Option ID = 21923]
4. [Option ID = 21921]
[Option ID = 21921]
21)
22)
[Question ID = 12935]
1. [Option ID = 21740]
2. [Option ID = 21738]
3. [Option ID = 21737]
4. [Option ID = 21739]
[Option ID = 21737]
[Question ID = 12941]
1. [Option ID = 21762]
2. [Option ID = 21761]
3. [Option ID = 21763]
4. [Option ID = 21764]
[Option ID = 21761]
[Question ID = 12934]
1. [Option ID = 21736]
2. [Option ID = 21733]
3. [Option ID = 21735]
4. [Option ID = 21734]

FirstRanker.com - FirstRanker's Choice
1)
2)
3)
4)
5)
DU MSc Physics
Topic:- DU_J19_MSC_PHY
In 2?s complement representation, the number 10110101 represents the decimal number
[Question ID = 12977]
1. -53 [Option ID = 21907]
2. 75 [Option ID = 21905]
3. 93 [Option ID = 21906]
4. -75 [Option ID = 21908]
75 [Option ID = 21905]
Water has a constant heat capacity of 4.2 J/K/kg over the temperature range 0?100 C. A kilogram of water, initially at
0 C is brought in contact with a heat reservoir at 100 C. When the water comes to equilibrium, what is the total change in
entropy of the universe?
[Question ID = 12978]
1. 2437.8 J/K [Option ID = 21909]
2. 1310.8 J/K [Option ID = 21911]
3. 184.8 J/K [Option ID = 21912]
4. 369.2 J/K [Option ID = 21910]
2437.8 J/K [Option ID = 21909]
The Sun is approximately 25,000 light years away from the centre of the Milky Way and moves around it, in an
approximately circular path, in roughly 170 million years. Given that sunlight takes approximately 8 min to reach the Earth,
what is the ratio of the masses of the galaxy and the Sun? [Question ID = 12944]
1. 1.5?10
12
[Option ID = 21775]
2. 1.5?10
11
[Option ID = 21773]
3. 5?10
11
[Option ID = 21774]
4. 5?10
10
[Option ID = 21776]
1.5?10
11
[Option ID = 21773]
An AND gate has two inputs A and B and one inhibit input S. The output is 1 if
[Question ID = 12980]
1. A = 1, B = 1, S = 1 [Option ID = 21918]
2. A = 1, B = 1, S = 0 [Option ID = 21920]
3. A = 1, B = 0, S = 0 [Option ID = 21917]
4. A = 1, B = 0, S = 1 [Option ID = 21919]
A = 1, B = 0, S = 0 [Option ID = 21917]
A wire carrying a current 2A is bent into the shape of a two semi circles, one with a radius 1m and the other with radius
2m . The two semi circles are connected at their ends that is along the two radii. The magnetic field at the center of the
semi-circles is
[Question ID = 12957]
1. ??10
-7
T [Option ID = 21827]
2. cannot be determined from the information provided above. [Option ID = 21828]
3. 16?10
-7
T [Option ID = 21825]
6)
7)
8)
9)
10)
4. 2?10
-7
T [Option ID = 21826]
16?10
-7
T [Option ID = 21825]
Under ideal conditions, the electric and magnetic fields inside a superconductor are zero. Which of the following must
be true just outside the surface of the superconductor?
[Question ID = 12974]
1. B =0 [Option ID = 21893]
2. B is perpendicular to the surface [Option ID = 21895]
3. B is tangential to the surface [Option ID = 21894]
4. The magnetic flux is quantized. [Option ID = 21896]
B =0 [Option ID = 21893]
Under certain conditions, a beam of electrons impinging on a crystal surface will diffract and a scattering pattern of the
beam can be obtained. What is the approximate kinetic energy of the electrons needed in order to see the pattern?
(Assume the lattice spacing of the crystal tobe 0.4 nm.)
[Question ID = 12973]
1. 100 eV [Option ID = 21892]
2. 1 eV [Option ID = 21890]
3. 0.1 eV [Option ID = 21889]
4. 10 eV [Option ID = 21891]
0.1 eV [Option ID = 21889]
Fermat?s principle of ray optics states, ?A ray oflight follows the path between two points which requires the least
time.? This principle can beused to derive which of the following?
I. Snell?s law of refraction
II. The law of reflection
III. Rayleigh?s criterion for resolution
[Question ID = 12972]
1. I and II [Option ID = 21885]
2. I only [Option ID = 21886]
3. I, II and III [Option ID = 21888]
4. II only [Option ID = 21887]
I and II [Option ID = 21885]
For a mole of ideal gas at T=35 C , what is the work done for an isothermal expansion from a volume V
0
to 10V
0
?
[Question ID = 12947]
1. 10
4
J [Option ID = 21785]
2. 10
3
J [Option ID = 21788]
3. 3?10
3
J [Option ID = 21787]
4. 6?10
3
J [Option ID = 21786]
10
4
J [Option ID = 21785]
A single photon of energy 100 MeV decays into an electron and a positron. Which of the following statements is true?
[Question ID = 12970]
1. It does not violate any of the above conservation laws. [Option ID = 21879]
2. This process violates energy momentum conservation. [Option ID = 21880]
3. This process violates angular momentum conservation. [Option ID = 21878]
4. This process violates lepton number conservation. [Option ID = 21877]
11)
12)
13)
14)
15)
This process violates lepton number conservation. [Option ID = 21877]
An electric field E can pull an electron out of a Helium atom in the same time that the electron takes to go around the
nucleus once. Then E is [Question ID = 12965]
1. 2?10
12
V/m [Option ID = 21860]
2. 5?10
11
V/m [Option ID = 21858]
3. 10
12
V/m [Option ID = 21859]
4. 10
13
V/m [Option ID = 21857]
10
13
V/m [Option ID = 21857]
A material has a heat capacity at constant volume C that is unchanging over a wide temperature range. Two identical
bodies made of this material, at initial temperatures T and 9T , respectively, are used to drive a heat engine. The maximum
amount of work that can be obtained from this engine is
[Question ID = 12979]
1. 9 C T [Option ID = 21915]
2. 4 C T [Option ID = 21914]
3. 8 C T [Option ID = 21913]
4. 3 C T [Option ID = 21916]
8 C T [Option ID = 21913]
An electrical device operates on 9 V and has a resistance of 21?. It is connected to a power supply of 120 V output
through a transformer. The current in the primary of the transformer is [Question ID = 12971]
1. 0.032 A [Option ID = 21882]
2. Cannot be determined from the information supplied. [Option ID = 21884]
3. 0.23 A [Option ID = 21883]
4. 2.32 A [Option ID = 21881]
2.32 A [Option ID = 21881]
The frequency of oscillation of an LC circuit is ? . The plates of the parallel plate capacitor are pulled apart to twice the
original distance and a dielectric with dielectric constant k is inserted. The frequency of oscillation for the new
configuration is [Question ID = 12961]
1. [Option ID = 21841]
2. [Option ID = 21844]
3. [Option ID = 21842]
4. [Option ID = 21843]
[Option ID = 21841]
One mole of a monoatomic perfect gas is initially at a constant temperature T
0
. It expands from a volume V
0
to 2V
0
under constant pressure. The heat absorbed by the gas is [Question ID = 12946]
1. [Option ID = 21781]
2. [Option ID = 21783]
3. [Option ID = 21784]
4. [Option ID = 21782]
16)
17)
18)
19)
20)
[Option ID = 21781]
A scalar meson decays into three pseudoscalar mesons. The decay happens through [Question ID = 12968]
1. strong interaction [Option ID = 21870]
2. weak interaction [Option ID = 21869]
3. gravitational interaction [Option ID = 21872]
4. electromagnetic interaction [Option ID = 21871]
weak interaction [Option ID = 21869]
An ideal monoatomic gas, initially at T=20 C , expands adiabatically from a volume V
0
to 5V
0
. What is the final
temperature [Question ID = 12948]
1. -33 C [Option ID = 21792]
2. -113 C [Option ID = 21791]
3. -20 C [Option ID = 21789]
4. -173 C [Option ID = 21790]
-20 C [Option ID = 21789]
Consider three identical, ideal capacitors. The first capacitoris charged to a voltage V and then disconnected from the
battery.The other two capacitors, initially uncharged and connected in series, are then connected across the first. What is
the final voltage across the first capacitor?
[Question ID = 12975]
1. V / 3 [Option ID = 21899]
2. V [Option ID = 21898]
3. 2 V / 5 [Option ID = 21897]
4. 2 V / 3 [Option ID = 21900]
2 V / 5 [Option ID = 21897]
[Question ID = 12981]
1. [Option ID = 21924]
2. [Option ID = 21922]
3. [Option ID = 21923]
4. [Option ID = 21921]
[Option ID = 21921]
21)
22)
[Question ID = 12935]
1. [Option ID = 21740]
2. [Option ID = 21738]
3. [Option ID = 21737]
4. [Option ID = 21739]
[Option ID = 21737]
[Question ID = 12941]
1. [Option ID = 21762]
2. [Option ID = 21761]
3. [Option ID = 21763]
4. [Option ID = 21764]
[Option ID = 21761]
[Question ID = 12934]
1. [Option ID = 21736]
2. [Option ID = 21733]
3. [Option ID = 21735]
4. [Option ID = 21734]
23)
24)
25)
[Option ID = 21733]
[Question ID = 12937]
1. [Option ID = 21747]
2. [Option ID = 21745]
3. [Option ID = 21746]
4. [Option ID = 21748]
[Option ID = 21745]
[Question ID = 12982]
1. [Option ID = 21926]
2. [Option ID = 21928]
3. [Option ID = 21927]
4. [Option ID = 21925]
[Option ID = 21925]
[Question ID = 12959]
1. [Option ID = 21834]
2. [Option ID = 21833]
3. [Option ID = 21835]
4. [Option ID = 21836]

FirstRanker.com - FirstRanker's Choice
1)
2)
3)
4)
5)
DU MSc Physics
Topic:- DU_J19_MSC_PHY
In 2?s complement representation, the number 10110101 represents the decimal number
[Question ID = 12977]
1. -53 [Option ID = 21907]
2. 75 [Option ID = 21905]
3. 93 [Option ID = 21906]
4. -75 [Option ID = 21908]
75 [Option ID = 21905]
Water has a constant heat capacity of 4.2 J/K/kg over the temperature range 0?100 C. A kilogram of water, initially at
0 C is brought in contact with a heat reservoir at 100 C. When the water comes to equilibrium, what is the total change in
entropy of the universe?
[Question ID = 12978]
1. 2437.8 J/K [Option ID = 21909]
2. 1310.8 J/K [Option ID = 21911]
3. 184.8 J/K [Option ID = 21912]
4. 369.2 J/K [Option ID = 21910]
2437.8 J/K [Option ID = 21909]
The Sun is approximately 25,000 light years away from the centre of the Milky Way and moves around it, in an
approximately circular path, in roughly 170 million years. Given that sunlight takes approximately 8 min to reach the Earth,
what is the ratio of the masses of the galaxy and the Sun? [Question ID = 12944]
1. 1.5?10
12
[Option ID = 21775]
2. 1.5?10
11
[Option ID = 21773]
3. 5?10
11
[Option ID = 21774]
4. 5?10
10
[Option ID = 21776]
1.5?10
11
[Option ID = 21773]
An AND gate has two inputs A and B and one inhibit input S. The output is 1 if
[Question ID = 12980]
1. A = 1, B = 1, S = 1 [Option ID = 21918]
2. A = 1, B = 1, S = 0 [Option ID = 21920]
3. A = 1, B = 0, S = 0 [Option ID = 21917]
4. A = 1, B = 0, S = 1 [Option ID = 21919]
A = 1, B = 0, S = 0 [Option ID = 21917]
A wire carrying a current 2A is bent into the shape of a two semi circles, one with a radius 1m and the other with radius
2m . The two semi circles are connected at their ends that is along the two radii. The magnetic field at the center of the
semi-circles is
[Question ID = 12957]
1. ??10
-7
T [Option ID = 21827]
2. cannot be determined from the information provided above. [Option ID = 21828]
3. 16?10
-7
T [Option ID = 21825]
6)
7)
8)
9)
10)
4. 2?10
-7
T [Option ID = 21826]
16?10
-7
T [Option ID = 21825]
Under ideal conditions, the electric and magnetic fields inside a superconductor are zero. Which of the following must
be true just outside the surface of the superconductor?
[Question ID = 12974]
1. B =0 [Option ID = 21893]
2. B is perpendicular to the surface [Option ID = 21895]
3. B is tangential to the surface [Option ID = 21894]
4. The magnetic flux is quantized. [Option ID = 21896]
B =0 [Option ID = 21893]
Under certain conditions, a beam of electrons impinging on a crystal surface will diffract and a scattering pattern of the
beam can be obtained. What is the approximate kinetic energy of the electrons needed in order to see the pattern?
(Assume the lattice spacing of the crystal tobe 0.4 nm.)
[Question ID = 12973]
1. 100 eV [Option ID = 21892]
2. 1 eV [Option ID = 21890]
3. 0.1 eV [Option ID = 21889]
4. 10 eV [Option ID = 21891]
0.1 eV [Option ID = 21889]
Fermat?s principle of ray optics states, ?A ray oflight follows the path between two points which requires the least
time.? This principle can beused to derive which of the following?
I. Snell?s law of refraction
II. The law of reflection
III. Rayleigh?s criterion for resolution
[Question ID = 12972]
1. I and II [Option ID = 21885]
2. I only [Option ID = 21886]
3. I, II and III [Option ID = 21888]
4. II only [Option ID = 21887]
I and II [Option ID = 21885]
For a mole of ideal gas at T=35 C , what is the work done for an isothermal expansion from a volume V
0
to 10V
0
?
[Question ID = 12947]
1. 10
4
J [Option ID = 21785]
2. 10
3
J [Option ID = 21788]
3. 3?10
3
J [Option ID = 21787]
4. 6?10
3
J [Option ID = 21786]
10
4
J [Option ID = 21785]
A single photon of energy 100 MeV decays into an electron and a positron. Which of the following statements is true?
[Question ID = 12970]
1. It does not violate any of the above conservation laws. [Option ID = 21879]
2. This process violates energy momentum conservation. [Option ID = 21880]
3. This process violates angular momentum conservation. [Option ID = 21878]
4. This process violates lepton number conservation. [Option ID = 21877]
11)
12)
13)
14)
15)
This process violates lepton number conservation. [Option ID = 21877]
An electric field E can pull an electron out of a Helium atom in the same time that the electron takes to go around the
nucleus once. Then E is [Question ID = 12965]
1. 2?10
12
V/m [Option ID = 21860]
2. 5?10
11
V/m [Option ID = 21858]
3. 10
12
V/m [Option ID = 21859]
4. 10
13
V/m [Option ID = 21857]
10
13
V/m [Option ID = 21857]
A material has a heat capacity at constant volume C that is unchanging over a wide temperature range. Two identical
bodies made of this material, at initial temperatures T and 9T , respectively, are used to drive a heat engine. The maximum
amount of work that can be obtained from this engine is
[Question ID = 12979]
1. 9 C T [Option ID = 21915]
2. 4 C T [Option ID = 21914]
3. 8 C T [Option ID = 21913]
4. 3 C T [Option ID = 21916]
8 C T [Option ID = 21913]
An electrical device operates on 9 V and has a resistance of 21?. It is connected to a power supply of 120 V output
through a transformer. The current in the primary of the transformer is [Question ID = 12971]
1. 0.032 A [Option ID = 21882]
2. Cannot be determined from the information supplied. [Option ID = 21884]
3. 0.23 A [Option ID = 21883]
4. 2.32 A [Option ID = 21881]
2.32 A [Option ID = 21881]
The frequency of oscillation of an LC circuit is ? . The plates of the parallel plate capacitor are pulled apart to twice the
original distance and a dielectric with dielectric constant k is inserted. The frequency of oscillation for the new
configuration is [Question ID = 12961]
1. [Option ID = 21841]
2. [Option ID = 21844]
3. [Option ID = 21842]
4. [Option ID = 21843]
[Option ID = 21841]
One mole of a monoatomic perfect gas is initially at a constant temperature T
0
. It expands from a volume V
0
to 2V
0
under constant pressure. The heat absorbed by the gas is [Question ID = 12946]
1. [Option ID = 21781]
2. [Option ID = 21783]
3. [Option ID = 21784]
4. [Option ID = 21782]
16)
17)
18)
19)
20)
[Option ID = 21781]
A scalar meson decays into three pseudoscalar mesons. The decay happens through [Question ID = 12968]
1. strong interaction [Option ID = 21870]
2. weak interaction [Option ID = 21869]
3. gravitational interaction [Option ID = 21872]
4. electromagnetic interaction [Option ID = 21871]
weak interaction [Option ID = 21869]
An ideal monoatomic gas, initially at T=20 C , expands adiabatically from a volume V
0
to 5V
0
. What is the final
temperature [Question ID = 12948]
1. -33 C [Option ID = 21792]
2. -113 C [Option ID = 21791]
3. -20 C [Option ID = 21789]
4. -173 C [Option ID = 21790]
-20 C [Option ID = 21789]
Consider three identical, ideal capacitors. The first capacitoris charged to a voltage V and then disconnected from the
battery.The other two capacitors, initially uncharged and connected in series, are then connected across the first. What is
the final voltage across the first capacitor?
[Question ID = 12975]
1. V / 3 [Option ID = 21899]
2. V [Option ID = 21898]
3. 2 V / 5 [Option ID = 21897]
4. 2 V / 3 [Option ID = 21900]
2 V / 5 [Option ID = 21897]
[Question ID = 12981]
1. [Option ID = 21924]
2. [Option ID = 21922]
3. [Option ID = 21923]
4. [Option ID = 21921]
[Option ID = 21921]
21)
22)
[Question ID = 12935]
1. [Option ID = 21740]
2. [Option ID = 21738]
3. [Option ID = 21737]
4. [Option ID = 21739]
[Option ID = 21737]
[Question ID = 12941]
1. [Option ID = 21762]
2. [Option ID = 21761]
3. [Option ID = 21763]
4. [Option ID = 21764]
[Option ID = 21761]
[Question ID = 12934]
1. [Option ID = 21736]
2. [Option ID = 21733]
3. [Option ID = 21735]
4. [Option ID = 21734]
23)
24)
25)
[Option ID = 21733]
[Question ID = 12937]
1. [Option ID = 21747]
2. [Option ID = 21745]
3. [Option ID = 21746]
4. [Option ID = 21748]
[Option ID = 21745]
[Question ID = 12982]
1. [Option ID = 21926]
2. [Option ID = 21928]
3. [Option ID = 21927]
4. [Option ID = 21925]
[Option ID = 21925]
[Question ID = 12959]
1. [Option ID = 21834]
2. [Option ID = 21833]
3. [Option ID = 21835]
4. [Option ID = 21836]
26)
27)
28)
[Option ID = 21833]
[Question ID = 12952]
1. [Option ID = 21806]
2. [Option ID = 21808]
3. [Option ID = 21805]
4. [Option ID = 21807]
[Option ID = 21805]
[Question ID = 12940]
1. [Option ID = 21759]
2. [Option ID = 21757]
3. [Option ID = 21758]
4. [Option ID = 21760]
[Option ID = 21757]
[Question ID = 12963]
1. [Option ID = 21849]
2. [Option ID = 21851]
3. [Option ID = 21850]
4. [Option ID = 21852]

FirstRanker.com - FirstRanker's Choice
1)
2)
3)
4)
5)
DU MSc Physics
Topic:- DU_J19_MSC_PHY
In 2?s complement representation, the number 10110101 represents the decimal number
[Question ID = 12977]
1. -53 [Option ID = 21907]
2. 75 [Option ID = 21905]
3. 93 [Option ID = 21906]
4. -75 [Option ID = 21908]
75 [Option ID = 21905]
Water has a constant heat capacity of 4.2 J/K/kg over the temperature range 0?100 C. A kilogram of water, initially at
0 C is brought in contact with a heat reservoir at 100 C. When the water comes to equilibrium, what is the total change in
entropy of the universe?
[Question ID = 12978]
1. 2437.8 J/K [Option ID = 21909]
2. 1310.8 J/K [Option ID = 21911]
3. 184.8 J/K [Option ID = 21912]
4. 369.2 J/K [Option ID = 21910]
2437.8 J/K [Option ID = 21909]
The Sun is approximately 25,000 light years away from the centre of the Milky Way and moves around it, in an
approximately circular path, in roughly 170 million years. Given that sunlight takes approximately 8 min to reach the Earth,
what is the ratio of the masses of the galaxy and the Sun? [Question ID = 12944]
1. 1.5?10
12
[Option ID = 21775]
2. 1.5?10
11
[Option ID = 21773]
3. 5?10
11
[Option ID = 21774]
4. 5?10
10
[Option ID = 21776]
1.5?10
11
[Option ID = 21773]
An AND gate has two inputs A and B and one inhibit input S. The output is 1 if
[Question ID = 12980]
1. A = 1, B = 1, S = 1 [Option ID = 21918]
2. A = 1, B = 1, S = 0 [Option ID = 21920]
3. A = 1, B = 0, S = 0 [Option ID = 21917]
4. A = 1, B = 0, S = 1 [Option ID = 21919]
A = 1, B = 0, S = 0 [Option ID = 21917]
A wire carrying a current 2A is bent into the shape of a two semi circles, one with a radius 1m and the other with radius
2m . The two semi circles are connected at their ends that is along the two radii. The magnetic field at the center of the
semi-circles is
[Question ID = 12957]
1. ??10
-7
T [Option ID = 21827]
2. cannot be determined from the information provided above. [Option ID = 21828]
3. 16?10
-7
T [Option ID = 21825]
6)
7)
8)
9)
10)
4. 2?10
-7
T [Option ID = 21826]
16?10
-7
T [Option ID = 21825]
Under ideal conditions, the electric and magnetic fields inside a superconductor are zero. Which of the following must
be true just outside the surface of the superconductor?
[Question ID = 12974]
1. B =0 [Option ID = 21893]
2. B is perpendicular to the surface [Option ID = 21895]
3. B is tangential to the surface [Option ID = 21894]
4. The magnetic flux is quantized. [Option ID = 21896]
B =0 [Option ID = 21893]
Under certain conditions, a beam of electrons impinging on a crystal surface will diffract and a scattering pattern of the
beam can be obtained. What is the approximate kinetic energy of the electrons needed in order to see the pattern?
(Assume the lattice spacing of the crystal tobe 0.4 nm.)
[Question ID = 12973]
1. 100 eV [Option ID = 21892]
2. 1 eV [Option ID = 21890]
3. 0.1 eV [Option ID = 21889]
4. 10 eV [Option ID = 21891]
0.1 eV [Option ID = 21889]
Fermat?s principle of ray optics states, ?A ray oflight follows the path between two points which requires the least
time.? This principle can beused to derive which of the following?
I. Snell?s law of refraction
II. The law of reflection
III. Rayleigh?s criterion for resolution
[Question ID = 12972]
1. I and II [Option ID = 21885]
2. I only [Option ID = 21886]
3. I, II and III [Option ID = 21888]
4. II only [Option ID = 21887]
I and II [Option ID = 21885]
For a mole of ideal gas at T=35 C , what is the work done for an isothermal expansion from a volume V
0
to 10V
0
?
[Question ID = 12947]
1. 10
4
J [Option ID = 21785]
2. 10
3
J [Option ID = 21788]
3. 3?10
3
J [Option ID = 21787]
4. 6?10
3
J [Option ID = 21786]
10
4
J [Option ID = 21785]
A single photon of energy 100 MeV decays into an electron and a positron. Which of the following statements is true?
[Question ID = 12970]
1. It does not violate any of the above conservation laws. [Option ID = 21879]
2. This process violates energy momentum conservation. [Option ID = 21880]
3. This process violates angular momentum conservation. [Option ID = 21878]
4. This process violates lepton number conservation. [Option ID = 21877]
11)
12)
13)
14)
15)
This process violates lepton number conservation. [Option ID = 21877]
An electric field E can pull an electron out of a Helium atom in the same time that the electron takes to go around the
nucleus once. Then E is [Question ID = 12965]
1. 2?10
12
V/m [Option ID = 21860]
2. 5?10
11
V/m [Option ID = 21858]
3. 10
12
V/m [Option ID = 21859]
4. 10
13
V/m [Option ID = 21857]
10
13
V/m [Option ID = 21857]
A material has a heat capacity at constant volume C that is unchanging over a wide temperature range. Two identical
bodies made of this material, at initial temperatures T and 9T , respectively, are used to drive a heat engine. The maximum
amount of work that can be obtained from this engine is
[Question ID = 12979]
1. 9 C T [Option ID = 21915]
2. 4 C T [Option ID = 21914]
3. 8 C T [Option ID = 21913]
4. 3 C T [Option ID = 21916]
8 C T [Option ID = 21913]
An electrical device operates on 9 V and has a resistance of 21?. It is connected to a power supply of 120 V output
through a transformer. The current in the primary of the transformer is [Question ID = 12971]
1. 0.032 A [Option ID = 21882]
2. Cannot be determined from the information supplied. [Option ID = 21884]
3. 0.23 A [Option ID = 21883]
4. 2.32 A [Option ID = 21881]
2.32 A [Option ID = 21881]
The frequency of oscillation of an LC circuit is ? . The plates of the parallel plate capacitor are pulled apart to twice the
original distance and a dielectric with dielectric constant k is inserted. The frequency of oscillation for the new
configuration is [Question ID = 12961]
1. [Option ID = 21841]
2. [Option ID = 21844]
3. [Option ID = 21842]
4. [Option ID = 21843]
[Option ID = 21841]
One mole of a monoatomic perfect gas is initially at a constant temperature T
0
. It expands from a volume V
0
to 2V
0
under constant pressure. The heat absorbed by the gas is [Question ID = 12946]
1. [Option ID = 21781]
2. [Option ID = 21783]
3. [Option ID = 21784]
4. [Option ID = 21782]
16)
17)
18)
19)
20)
[Option ID = 21781]
A scalar meson decays into three pseudoscalar mesons. The decay happens through [Question ID = 12968]
1. strong interaction [Option ID = 21870]
2. weak interaction [Option ID = 21869]
3. gravitational interaction [Option ID = 21872]
4. electromagnetic interaction [Option ID = 21871]
weak interaction [Option ID = 21869]
An ideal monoatomic gas, initially at T=20 C , expands adiabatically from a volume V
0
to 5V
0
. What is the final
temperature [Question ID = 12948]
1. -33 C [Option ID = 21792]
2. -113 C [Option ID = 21791]
3. -20 C [Option ID = 21789]
4. -173 C [Option ID = 21790]
-20 C [Option ID = 21789]
Consider three identical, ideal capacitors. The first capacitoris charged to a voltage V and then disconnected from the
battery.The other two capacitors, initially uncharged and connected in series, are then connected across the first. What is
the final voltage across the first capacitor?
[Question ID = 12975]
1. V / 3 [Option ID = 21899]
2. V [Option ID = 21898]
3. 2 V / 5 [Option ID = 21897]
4. 2 V / 3 [Option ID = 21900]
2 V / 5 [Option ID = 21897]
[Question ID = 12981]
1. [Option ID = 21924]
2. [Option ID = 21922]
3. [Option ID = 21923]
4. [Option ID = 21921]
[Option ID = 21921]
21)
22)
[Question ID = 12935]
1. [Option ID = 21740]
2. [Option ID = 21738]
3. [Option ID = 21737]
4. [Option ID = 21739]
[Option ID = 21737]
[Question ID = 12941]
1. [Option ID = 21762]
2. [Option ID = 21761]
3. [Option ID = 21763]
4. [Option ID = 21764]
[Option ID = 21761]
[Question ID = 12934]
1. [Option ID = 21736]
2. [Option ID = 21733]
3. [Option ID = 21735]
4. [Option ID = 21734]
23)
24)
25)
[Option ID = 21733]
[Question ID = 12937]
1. [Option ID = 21747]
2. [Option ID = 21745]
3. [Option ID = 21746]
4. [Option ID = 21748]
[Option ID = 21745]
[Question ID = 12982]
1. [Option ID = 21926]
2. [Option ID = 21928]
3. [Option ID = 21927]
4. [Option ID = 21925]
[Option ID = 21925]
[Question ID = 12959]
1. [Option ID = 21834]
2. [Option ID = 21833]
3. [Option ID = 21835]
4. [Option ID = 21836]
26)
27)
28)
[Option ID = 21833]
[Question ID = 12952]
1. [Option ID = 21806]
2. [Option ID = 21808]
3. [Option ID = 21805]
4. [Option ID = 21807]
[Option ID = 21805]
[Question ID = 12940]
1. [Option ID = 21759]
2. [Option ID = 21757]
3. [Option ID = 21758]
4. [Option ID = 21760]
[Option ID = 21757]
[Question ID = 12963]
1. [Option ID = 21849]
2. [Option ID = 21851]
3. [Option ID = 21850]
4. [Option ID = 21852]
29)
30)
31)
[Option ID = 21849]
[Question ID = 12943]
1. 2 [Option ID = 21770]
2. 1/2 [Option ID = 21769]
3. 1 [Option ID = 21772]
4. 3/2 [Option ID = 21771]
1/2 [Option ID = 21769]
[Question ID = 12936]
1. [Option ID = 21742]
2. [Option ID = 21743]
3. [Option ID = 21741]
4. [Option ID = 21744]
[Option ID = 21741]
[Question ID = 12955]
1. [Option ID = 21820]
2. [Option ID = 21817]
3. [Option ID = 21819]
4. [Option ID = 21818]

FirstRanker.com - FirstRanker's Choice
1)
2)
3)
4)
5)
DU MSc Physics
Topic:- DU_J19_MSC_PHY
In 2?s complement representation, the number 10110101 represents the decimal number
[Question ID = 12977]
1. -53 [Option ID = 21907]
2. 75 [Option ID = 21905]
3. 93 [Option ID = 21906]
4. -75 [Option ID = 21908]
75 [Option ID = 21905]
Water has a constant heat capacity of 4.2 J/K/kg over the temperature range 0?100 C. A kilogram of water, initially at
0 C is brought in contact with a heat reservoir at 100 C. When the water comes to equilibrium, what is the total change in
entropy of the universe?
[Question ID = 12978]
1. 2437.8 J/K [Option ID = 21909]
2. 1310.8 J/K [Option ID = 21911]
3. 184.8 J/K [Option ID = 21912]
4. 369.2 J/K [Option ID = 21910]
2437.8 J/K [Option ID = 21909]
The Sun is approximately 25,000 light years away from the centre of the Milky Way and moves around it, in an
approximately circular path, in roughly 170 million years. Given that sunlight takes approximately 8 min to reach the Earth,
what is the ratio of the masses of the galaxy and the Sun? [Question ID = 12944]
1. 1.5?10
12
[Option ID = 21775]
2. 1.5?10
11
[Option ID = 21773]
3. 5?10
11
[Option ID = 21774]
4. 5?10
10
[Option ID = 21776]
1.5?10
11
[Option ID = 21773]
An AND gate has two inputs A and B and one inhibit input S. The output is 1 if
[Question ID = 12980]
1. A = 1, B = 1, S = 1 [Option ID = 21918]
2. A = 1, B = 1, S = 0 [Option ID = 21920]
3. A = 1, B = 0, S = 0 [Option ID = 21917]
4. A = 1, B = 0, S = 1 [Option ID = 21919]
A = 1, B = 0, S = 0 [Option ID = 21917]
A wire carrying a current 2A is bent into the shape of a two semi circles, one with a radius 1m and the other with radius
2m . The two semi circles are connected at their ends that is along the two radii. The magnetic field at the center of the
semi-circles is
[Question ID = 12957]
1. ??10
-7
T [Option ID = 21827]
2. cannot be determined from the information provided above. [Option ID = 21828]
3. 16?10
-7
T [Option ID = 21825]
6)
7)
8)
9)
10)
4. 2?10
-7
T [Option ID = 21826]
16?10
-7
T [Option ID = 21825]
Under ideal conditions, the electric and magnetic fields inside a superconductor are zero. Which of the following must
be true just outside the surface of the superconductor?
[Question ID = 12974]
1. B =0 [Option ID = 21893]
2. B is perpendicular to the surface [Option ID = 21895]
3. B is tangential to the surface [Option ID = 21894]
4. The magnetic flux is quantized. [Option ID = 21896]
B =0 [Option ID = 21893]
Under certain conditions, a beam of electrons impinging on a crystal surface will diffract and a scattering pattern of the
beam can be obtained. What is the approximate kinetic energy of the electrons needed in order to see the pattern?
(Assume the lattice spacing of the crystal tobe 0.4 nm.)
[Question ID = 12973]
1. 100 eV [Option ID = 21892]
2. 1 eV [Option ID = 21890]
3. 0.1 eV [Option ID = 21889]
4. 10 eV [Option ID = 21891]
0.1 eV [Option ID = 21889]
Fermat?s principle of ray optics states, ?A ray oflight follows the path between two points which requires the least
time.? This principle can beused to derive which of the following?
I. Snell?s law of refraction
II. The law of reflection
III. Rayleigh?s criterion for resolution
[Question ID = 12972]
1. I and II [Option ID = 21885]
2. I only [Option ID = 21886]
3. I, II and III [Option ID = 21888]
4. II only [Option ID = 21887]
I and II [Option ID = 21885]
For a mole of ideal gas at T=35 C , what is the work done for an isothermal expansion from a volume V
0
to 10V
0
?
[Question ID = 12947]
1. 10
4
J [Option ID = 21785]
2. 10
3
J [Option ID = 21788]
3. 3?10
3
J [Option ID = 21787]
4. 6?10
3
J [Option ID = 21786]
10
4
J [Option ID = 21785]
A single photon of energy 100 MeV decays into an electron and a positron. Which of the following statements is true?
[Question ID = 12970]
1. It does not violate any of the above conservation laws. [Option ID = 21879]
2. This process violates energy momentum conservation. [Option ID = 21880]
3. This process violates angular momentum conservation. [Option ID = 21878]
4. This process violates lepton number conservation. [Option ID = 21877]
11)
12)
13)
14)
15)
This process violates lepton number conservation. [Option ID = 21877]
An electric field E can pull an electron out of a Helium atom in the same time that the electron takes to go around the
nucleus once. Then E is [Question ID = 12965]
1. 2?10
12
V/m [Option ID = 21860]
2. 5?10
11
V/m [Option ID = 21858]
3. 10
12
V/m [Option ID = 21859]
4. 10
13
V/m [Option ID = 21857]
10
13
V/m [Option ID = 21857]
A material has a heat capacity at constant volume C that is unchanging over a wide temperature range. Two identical
bodies made of this material, at initial temperatures T and 9T , respectively, are used to drive a heat engine. The maximum
amount of work that can be obtained from this engine is
[Question ID = 12979]
1. 9 C T [Option ID = 21915]
2. 4 C T [Option ID = 21914]
3. 8 C T [Option ID = 21913]
4. 3 C T [Option ID = 21916]
8 C T [Option ID = 21913]
An electrical device operates on 9 V and has a resistance of 21?. It is connected to a power supply of 120 V output
through a transformer. The current in the primary of the transformer is [Question ID = 12971]
1. 0.032 A [Option ID = 21882]
2. Cannot be determined from the information supplied. [Option ID = 21884]
3. 0.23 A [Option ID = 21883]
4. 2.32 A [Option ID = 21881]
2.32 A [Option ID = 21881]
The frequency of oscillation of an LC circuit is ? . The plates of the parallel plate capacitor are pulled apart to twice the
original distance and a dielectric with dielectric constant k is inserted. The frequency of oscillation for the new
configuration is [Question ID = 12961]
1. [Option ID = 21841]
2. [Option ID = 21844]
3. [Option ID = 21842]
4. [Option ID = 21843]
[Option ID = 21841]
One mole of a monoatomic perfect gas is initially at a constant temperature T
0
. It expands from a volume V
0
to 2V
0
under constant pressure. The heat absorbed by the gas is [Question ID = 12946]
1. [Option ID = 21781]
2. [Option ID = 21783]
3. [Option ID = 21784]
4. [Option ID = 21782]
16)
17)
18)
19)
20)
[Option ID = 21781]
A scalar meson decays into three pseudoscalar mesons. The decay happens through [Question ID = 12968]
1. strong interaction [Option ID = 21870]
2. weak interaction [Option ID = 21869]
3. gravitational interaction [Option ID = 21872]
4. electromagnetic interaction [Option ID = 21871]
weak interaction [Option ID = 21869]
An ideal monoatomic gas, initially at T=20 C , expands adiabatically from a volume V
0
to 5V
0
. What is the final
temperature [Question ID = 12948]
1. -33 C [Option ID = 21792]
2. -113 C [Option ID = 21791]
3. -20 C [Option ID = 21789]
4. -173 C [Option ID = 21790]
-20 C [Option ID = 21789]
Consider three identical, ideal capacitors. The first capacitoris charged to a voltage V and then disconnected from the
battery.The other two capacitors, initially uncharged and connected in series, are then connected across the first. What is
the final voltage across the first capacitor?
[Question ID = 12975]
1. V / 3 [Option ID = 21899]
2. V [Option ID = 21898]
3. 2 V / 5 [Option ID = 21897]
4. 2 V / 3 [Option ID = 21900]
2 V / 5 [Option ID = 21897]
[Question ID = 12981]
1. [Option ID = 21924]
2. [Option ID = 21922]
3. [Option ID = 21923]
4. [Option ID = 21921]
[Option ID = 21921]
21)
22)
[Question ID = 12935]
1. [Option ID = 21740]
2. [Option ID = 21738]
3. [Option ID = 21737]
4. [Option ID = 21739]
[Option ID = 21737]
[Question ID = 12941]
1. [Option ID = 21762]
2. [Option ID = 21761]
3. [Option ID = 21763]
4. [Option ID = 21764]
[Option ID = 21761]
[Question ID = 12934]
1. [Option ID = 21736]
2. [Option ID = 21733]
3. [Option ID = 21735]
4. [Option ID = 21734]
23)
24)
25)
[Option ID = 21733]
[Question ID = 12937]
1. [Option ID = 21747]
2. [Option ID = 21745]
3. [Option ID = 21746]
4. [Option ID = 21748]
[Option ID = 21745]
[Question ID = 12982]
1. [Option ID = 21926]
2. [Option ID = 21928]
3. [Option ID = 21927]
4. [Option ID = 21925]
[Option ID = 21925]
[Question ID = 12959]
1. [Option ID = 21834]
2. [Option ID = 21833]
3. [Option ID = 21835]
4. [Option ID = 21836]
26)
27)
28)
[Option ID = 21833]
[Question ID = 12952]
1. [Option ID = 21806]
2. [Option ID = 21808]
3. [Option ID = 21805]
4. [Option ID = 21807]
[Option ID = 21805]
[Question ID = 12940]
1. [Option ID = 21759]
2. [Option ID = 21757]
3. [Option ID = 21758]
4. [Option ID = 21760]
[Option ID = 21757]
[Question ID = 12963]
1. [Option ID = 21849]
2. [Option ID = 21851]
3. [Option ID = 21850]
4. [Option ID = 21852]
29)
30)
31)
[Option ID = 21849]
[Question ID = 12943]
1. 2 [Option ID = 21770]
2. 1/2 [Option ID = 21769]
3. 1 [Option ID = 21772]
4. 3/2 [Option ID = 21771]
1/2 [Option ID = 21769]
[Question ID = 12936]
1. [Option ID = 21742]
2. [Option ID = 21743]
3. [Option ID = 21741]
4. [Option ID = 21744]
[Option ID = 21741]
[Question ID = 12955]
1. [Option ID = 21820]
2. [Option ID = 21817]
3. [Option ID = 21819]
4. [Option ID = 21818]
32)
33)
34)
[Option ID = 21817]
[Question ID = 12954]
1. [Option ID = 21814]
2. [Option ID = 21815]
3. [Option ID = 21816]
4. [Option ID = 21813]
[Option ID = 21813]
[Question ID = 12938]
1. [Option ID = 21751]
2. [Option ID = 21750]
3. [Option ID = 21749]
4. [Option ID = 21752]
[Option ID = 21749]
[Question ID = 12962]
1. [Option ID = 21846]

FirstRanker.com - FirstRanker's Choice
1)
2)
3)
4)
5)
DU MSc Physics
Topic:- DU_J19_MSC_PHY
In 2?s complement representation, the number 10110101 represents the decimal number
[Question ID = 12977]
1. -53 [Option ID = 21907]
2. 75 [Option ID = 21905]
3. 93 [Option ID = 21906]
4. -75 [Option ID = 21908]
75 [Option ID = 21905]
Water has a constant heat capacity of 4.2 J/K/kg over the temperature range 0?100 C. A kilogram of water, initially at
0 C is brought in contact with a heat reservoir at 100 C. When the water comes to equilibrium, what is the total change in
entropy of the universe?
[Question ID = 12978]
1. 2437.8 J/K [Option ID = 21909]
2. 1310.8 J/K [Option ID = 21911]
3. 184.8 J/K [Option ID = 21912]
4. 369.2 J/K [Option ID = 21910]
2437.8 J/K [Option ID = 21909]
The Sun is approximately 25,000 light years away from the centre of the Milky Way and moves around it, in an
approximately circular path, in roughly 170 million years. Given that sunlight takes approximately 8 min to reach the Earth,
what is the ratio of the masses of the galaxy and the Sun? [Question ID = 12944]
1. 1.5?10
12
[Option ID = 21775]
2. 1.5?10
11
[Option ID = 21773]
3. 5?10
11
[Option ID = 21774]
4. 5?10
10
[Option ID = 21776]
1.5?10
11
[Option ID = 21773]
An AND gate has two inputs A and B and one inhibit input S. The output is 1 if
[Question ID = 12980]
1. A = 1, B = 1, S = 1 [Option ID = 21918]
2. A = 1, B = 1, S = 0 [Option ID = 21920]
3. A = 1, B = 0, S = 0 [Option ID = 21917]
4. A = 1, B = 0, S = 1 [Option ID = 21919]
A = 1, B = 0, S = 0 [Option ID = 21917]
A wire carrying a current 2A is bent into the shape of a two semi circles, one with a radius 1m and the other with radius
2m . The two semi circles are connected at their ends that is along the two radii. The magnetic field at the center of the
semi-circles is
[Question ID = 12957]
1. ??10
-7
T [Option ID = 21827]
2. cannot be determined from the information provided above. [Option ID = 21828]
3. 16?10
-7
T [Option ID = 21825]
6)
7)
8)
9)
10)
4. 2?10
-7
T [Option ID = 21826]
16?10
-7
T [Option ID = 21825]
Under ideal conditions, the electric and magnetic fields inside a superconductor are zero. Which of the following must
be true just outside the surface of the superconductor?
[Question ID = 12974]
1. B =0 [Option ID = 21893]
2. B is perpendicular to the surface [Option ID = 21895]
3. B is tangential to the surface [Option ID = 21894]
4. The magnetic flux is quantized. [Option ID = 21896]
B =0 [Option ID = 21893]
Under certain conditions, a beam of electrons impinging on a crystal surface will diffract and a scattering pattern of the
beam can be obtained. What is the approximate kinetic energy of the electrons needed in order to see the pattern?
(Assume the lattice spacing of the crystal tobe 0.4 nm.)
[Question ID = 12973]
1. 100 eV [Option ID = 21892]
2. 1 eV [Option ID = 21890]
3. 0.1 eV [Option ID = 21889]
4. 10 eV [Option ID = 21891]
0.1 eV [Option ID = 21889]
Fermat?s principle of ray optics states, ?A ray oflight follows the path between two points which requires the least
time.? This principle can beused to derive which of the following?
I. Snell?s law of refraction
II. The law of reflection
III. Rayleigh?s criterion for resolution
[Question ID = 12972]
1. I and II [Option ID = 21885]
2. I only [Option ID = 21886]
3. I, II and III [Option ID = 21888]
4. II only [Option ID = 21887]
I and II [Option ID = 21885]
For a mole of ideal gas at T=35 C , what is the work done for an isothermal expansion from a volume V
0
to 10V
0
?
[Question ID = 12947]
1. 10
4
J [Option ID = 21785]
2. 10
3
J [Option ID = 21788]
3. 3?10
3
J [Option ID = 21787]
4. 6?10
3
J [Option ID = 21786]
10
4
J [Option ID = 21785]
A single photon of energy 100 MeV decays into an electron and a positron. Which of the following statements is true?
[Question ID = 12970]
1. It does not violate any of the above conservation laws. [Option ID = 21879]
2. This process violates energy momentum conservation. [Option ID = 21880]
3. This process violates angular momentum conservation. [Option ID = 21878]
4. This process violates lepton number conservation. [Option ID = 21877]
11)
12)
13)
14)
15)
This process violates lepton number conservation. [Option ID = 21877]
An electric field E can pull an electron out of a Helium atom in the same time that the electron takes to go around the
nucleus once. Then E is [Question ID = 12965]
1. 2?10
12
V/m [Option ID = 21860]
2. 5?10
11
V/m [Option ID = 21858]
3. 10
12
V/m [Option ID = 21859]
4. 10
13
V/m [Option ID = 21857]
10
13
V/m [Option ID = 21857]
A material has a heat capacity at constant volume C that is unchanging over a wide temperature range. Two identical
bodies made of this material, at initial temperatures T and 9T , respectively, are used to drive a heat engine. The maximum
amount of work that can be obtained from this engine is
[Question ID = 12979]
1. 9 C T [Option ID = 21915]
2. 4 C T [Option ID = 21914]
3. 8 C T [Option ID = 21913]
4. 3 C T [Option ID = 21916]
8 C T [Option ID = 21913]
An electrical device operates on 9 V and has a resistance of 21?. It is connected to a power supply of 120 V output
through a transformer. The current in the primary of the transformer is [Question ID = 12971]
1. 0.032 A [Option ID = 21882]
2. Cannot be determined from the information supplied. [Option ID = 21884]
3. 0.23 A [Option ID = 21883]
4. 2.32 A [Option ID = 21881]
2.32 A [Option ID = 21881]
The frequency of oscillation of an LC circuit is ? . The plates of the parallel plate capacitor are pulled apart to twice the
original distance and a dielectric with dielectric constant k is inserted. The frequency of oscillation for the new
configuration is [Question ID = 12961]
1. [Option ID = 21841]
2. [Option ID = 21844]
3. [Option ID = 21842]
4. [Option ID = 21843]
[Option ID = 21841]
One mole of a monoatomic perfect gas is initially at a constant temperature T
0
. It expands from a volume V
0
to 2V
0
under constant pressure. The heat absorbed by the gas is [Question ID = 12946]
1. [Option ID = 21781]
2. [Option ID = 21783]
3. [Option ID = 21784]
4. [Option ID = 21782]
16)
17)
18)
19)
20)
[Option ID = 21781]
A scalar meson decays into three pseudoscalar mesons. The decay happens through [Question ID = 12968]
1. strong interaction [Option ID = 21870]
2. weak interaction [Option ID = 21869]
3. gravitational interaction [Option ID = 21872]
4. electromagnetic interaction [Option ID = 21871]
weak interaction [Option ID = 21869]
An ideal monoatomic gas, initially at T=20 C , expands adiabatically from a volume V
0
to 5V
0
. What is the final
temperature [Question ID = 12948]
1. -33 C [Option ID = 21792]
2. -113 C [Option ID = 21791]
3. -20 C [Option ID = 21789]
4. -173 C [Option ID = 21790]
-20 C [Option ID = 21789]
Consider three identical, ideal capacitors. The first capacitoris charged to a voltage V and then disconnected from the
battery.The other two capacitors, initially uncharged and connected in series, are then connected across the first. What is
the final voltage across the first capacitor?
[Question ID = 12975]
1. V / 3 [Option ID = 21899]
2. V [Option ID = 21898]
3. 2 V / 5 [Option ID = 21897]
4. 2 V / 3 [Option ID = 21900]
2 V / 5 [Option ID = 21897]
[Question ID = 12981]
1. [Option ID = 21924]
2. [Option ID = 21922]
3. [Option ID = 21923]
4. [Option ID = 21921]
[Option ID = 21921]
21)
22)
[Question ID = 12935]
1. [Option ID = 21740]
2. [Option ID = 21738]
3. [Option ID = 21737]
4. [Option ID = 21739]
[Option ID = 21737]
[Question ID = 12941]
1. [Option ID = 21762]
2. [Option ID = 21761]
3. [Option ID = 21763]
4. [Option ID = 21764]
[Option ID = 21761]
[Question ID = 12934]
1. [Option ID = 21736]
2. [Option ID = 21733]
3. [Option ID = 21735]
4. [Option ID = 21734]
23)
24)
25)
[Option ID = 21733]
[Question ID = 12937]
1. [Option ID = 21747]
2. [Option ID = 21745]
3. [Option ID = 21746]
4. [Option ID = 21748]
[Option ID = 21745]
[Question ID = 12982]
1. [Option ID = 21926]
2. [Option ID = 21928]
3. [Option ID = 21927]
4. [Option ID = 21925]
[Option ID = 21925]
[Question ID = 12959]
1. [Option ID = 21834]
2. [Option ID = 21833]
3. [Option ID = 21835]
4. [Option ID = 21836]
26)
27)
28)
[Option ID = 21833]
[Question ID = 12952]
1. [Option ID = 21806]
2. [Option ID = 21808]
3. [Option ID = 21805]
4. [Option ID = 21807]
[Option ID = 21805]
[Question ID = 12940]
1. [Option ID = 21759]
2. [Option ID = 21757]
3. [Option ID = 21758]
4. [Option ID = 21760]
[Option ID = 21757]
[Question ID = 12963]
1. [Option ID = 21849]
2. [Option ID = 21851]
3. [Option ID = 21850]
4. [Option ID = 21852]
29)
30)
31)
[Option ID = 21849]
[Question ID = 12943]
1. 2 [Option ID = 21770]
2. 1/2 [Option ID = 21769]
3. 1 [Option ID = 21772]
4. 3/2 [Option ID = 21771]
1/2 [Option ID = 21769]
[Question ID = 12936]
1. [Option ID = 21742]
2. [Option ID = 21743]
3. [Option ID = 21741]
4. [Option ID = 21744]
[Option ID = 21741]
[Question ID = 12955]
1. [Option ID = 21820]
2. [Option ID = 21817]
3. [Option ID = 21819]
4. [Option ID = 21818]
32)
33)
34)
[Option ID = 21817]
[Question ID = 12954]
1. [Option ID = 21814]
2. [Option ID = 21815]
3. [Option ID = 21816]
4. [Option ID = 21813]
[Option ID = 21813]
[Question ID = 12938]
1. [Option ID = 21751]
2. [Option ID = 21750]
3. [Option ID = 21749]
4. [Option ID = 21752]
[Option ID = 21749]
[Question ID = 12962]
1. [Option ID = 21846]
35)
36)
37)
2. [Option ID = 21845]
3. [Option ID = 21847]
4. [Option ID = 21848]
[Option ID = 21845]
[Question ID = 12983]
1. an exponential amplifier [Option ID = 21929]
2. a half wave rectifier [Option ID = 21930]
3. a logarithmic amplifier [Option ID = 21932]
4. a differentiator [Option ID = 21931]
an exponential amplifier [Option ID = 21929]
[Question ID = 12939]
1. [Option ID = 21755]
2. [Option ID = 21753]
3. [Option ID = 21756]
4. [Option ID = 21754]
[Option ID = 21753]
[Question ID = 12951]

FirstRanker.com - FirstRanker's Choice
1)
2)
3)
4)
5)
DU MSc Physics
Topic:- DU_J19_MSC_PHY
In 2?s complement representation, the number 10110101 represents the decimal number
[Question ID = 12977]
1. -53 [Option ID = 21907]
2. 75 [Option ID = 21905]
3. 93 [Option ID = 21906]
4. -75 [Option ID = 21908]
75 [Option ID = 21905]
Water has a constant heat capacity of 4.2 J/K/kg over the temperature range 0?100 C. A kilogram of water, initially at
0 C is brought in contact with a heat reservoir at 100 C. When the water comes to equilibrium, what is the total change in
entropy of the universe?
[Question ID = 12978]
1. 2437.8 J/K [Option ID = 21909]
2. 1310.8 J/K [Option ID = 21911]
3. 184.8 J/K [Option ID = 21912]
4. 369.2 J/K [Option ID = 21910]
2437.8 J/K [Option ID = 21909]
The Sun is approximately 25,000 light years away from the centre of the Milky Way and moves around it, in an
approximately circular path, in roughly 170 million years. Given that sunlight takes approximately 8 min to reach the Earth,
what is the ratio of the masses of the galaxy and the Sun? [Question ID = 12944]
1. 1.5?10
12
[Option ID = 21775]
2. 1.5?10
11
[Option ID = 21773]
3. 5?10
11
[Option ID = 21774]
4. 5?10
10
[Option ID = 21776]
1.5?10
11
[Option ID = 21773]
An AND gate has two inputs A and B and one inhibit input S. The output is 1 if
[Question ID = 12980]
1. A = 1, B = 1, S = 1 [Option ID = 21918]
2. A = 1, B = 1, S = 0 [Option ID = 21920]
3. A = 1, B = 0, S = 0 [Option ID = 21917]
4. A = 1, B = 0, S = 1 [Option ID = 21919]
A = 1, B = 0, S = 0 [Option ID = 21917]
A wire carrying a current 2A is bent into the shape of a two semi circles, one with a radius 1m and the other with radius
2m . The two semi circles are connected at their ends that is along the two radii. The magnetic field at the center of the
semi-circles is
[Question ID = 12957]
1. ??10
-7
T [Option ID = 21827]
2. cannot be determined from the information provided above. [Option ID = 21828]
3. 16?10
-7
T [Option ID = 21825]
6)
7)
8)
9)
10)
4. 2?10
-7
T [Option ID = 21826]
16?10
-7
T [Option ID = 21825]
Under ideal conditions, the electric and magnetic fields inside a superconductor are zero. Which of the following must
be true just outside the surface of the superconductor?
[Question ID = 12974]
1. B =0 [Option ID = 21893]
2. B is perpendicular to the surface [Option ID = 21895]
3. B is tangential to the surface [Option ID = 21894]
4. The magnetic flux is quantized. [Option ID = 21896]
B =0 [Option ID = 21893]
Under certain conditions, a beam of electrons impinging on a crystal surface will diffract and a scattering pattern of the
beam can be obtained. What is the approximate kinetic energy of the electrons needed in order to see the pattern?
(Assume the lattice spacing of the crystal tobe 0.4 nm.)
[Question ID = 12973]
1. 100 eV [Option ID = 21892]
2. 1 eV [Option ID = 21890]
3. 0.1 eV [Option ID = 21889]
4. 10 eV [Option ID = 21891]
0.1 eV [Option ID = 21889]
Fermat?s principle of ray optics states, ?A ray oflight follows the path between two points which requires the least
time.? This principle can beused to derive which of the following?
I. Snell?s law of refraction
II. The law of reflection
III. Rayleigh?s criterion for resolution
[Question ID = 12972]
1. I and II [Option ID = 21885]
2. I only [Option ID = 21886]
3. I, II and III [Option ID = 21888]
4. II only [Option ID = 21887]
I and II [Option ID = 21885]
For a mole of ideal gas at T=35 C , what is the work done for an isothermal expansion from a volume V
0
to 10V
0
?
[Question ID = 12947]
1. 10
4
J [Option ID = 21785]
2. 10
3
J [Option ID = 21788]
3. 3?10
3
J [Option ID = 21787]
4. 6?10
3
J [Option ID = 21786]
10
4
J [Option ID = 21785]
A single photon of energy 100 MeV decays into an electron and a positron. Which of the following statements is true?
[Question ID = 12970]
1. It does not violate any of the above conservation laws. [Option ID = 21879]
2. This process violates energy momentum conservation. [Option ID = 21880]
3. This process violates angular momentum conservation. [Option ID = 21878]
4. This process violates lepton number conservation. [Option ID = 21877]
11)
12)
13)
14)
15)
This process violates lepton number conservation. [Option ID = 21877]
An electric field E can pull an electron out of a Helium atom in the same time that the electron takes to go around the
nucleus once. Then E is [Question ID = 12965]
1. 2?10
12
V/m [Option ID = 21860]
2. 5?10
11
V/m [Option ID = 21858]
3. 10
12
V/m [Option ID = 21859]
4. 10
13
V/m [Option ID = 21857]
10
13
V/m [Option ID = 21857]
A material has a heat capacity at constant volume C that is unchanging over a wide temperature range. Two identical
bodies made of this material, at initial temperatures T and 9T , respectively, are used to drive a heat engine. The maximum
amount of work that can be obtained from this engine is
[Question ID = 12979]
1. 9 C T [Option ID = 21915]
2. 4 C T [Option ID = 21914]
3. 8 C T [Option ID = 21913]
4. 3 C T [Option ID = 21916]
8 C T [Option ID = 21913]
An electrical device operates on 9 V and has a resistance of 21?. It is connected to a power supply of 120 V output
through a transformer. The current in the primary of the transformer is [Question ID = 12971]
1. 0.032 A [Option ID = 21882]
2. Cannot be determined from the information supplied. [Option ID = 21884]
3. 0.23 A [Option ID = 21883]
4. 2.32 A [Option ID = 21881]
2.32 A [Option ID = 21881]
The frequency of oscillation of an LC circuit is ? . The plates of the parallel plate capacitor are pulled apart to twice the
original distance and a dielectric with dielectric constant k is inserted. The frequency of oscillation for the new
configuration is [Question ID = 12961]
1. [Option ID = 21841]
2. [Option ID = 21844]
3. [Option ID = 21842]
4. [Option ID = 21843]
[Option ID = 21841]
One mole of a monoatomic perfect gas is initially at a constant temperature T
0
. It expands from a volume V
0
to 2V
0
under constant pressure. The heat absorbed by the gas is [Question ID = 12946]
1. [Option ID = 21781]
2. [Option ID = 21783]
3. [Option ID = 21784]
4. [Option ID = 21782]
16)
17)
18)
19)
20)
[Option ID = 21781]
A scalar meson decays into three pseudoscalar mesons. The decay happens through [Question ID = 12968]
1. strong interaction [Option ID = 21870]
2. weak interaction [Option ID = 21869]
3. gravitational interaction [Option ID = 21872]
4. electromagnetic interaction [Option ID = 21871]
weak interaction [Option ID = 21869]
An ideal monoatomic gas, initially at T=20 C , expands adiabatically from a volume V
0
to 5V
0
. What is the final
temperature [Question ID = 12948]
1. -33 C [Option ID = 21792]
2. -113 C [Option ID = 21791]
3. -20 C [Option ID = 21789]
4. -173 C [Option ID = 21790]
-20 C [Option ID = 21789]
Consider three identical, ideal capacitors. The first capacitoris charged to a voltage V and then disconnected from the
battery.The other two capacitors, initially uncharged and connected in series, are then connected across the first. What is
the final voltage across the first capacitor?
[Question ID = 12975]
1. V / 3 [Option ID = 21899]
2. V [Option ID = 21898]
3. 2 V / 5 [Option ID = 21897]
4. 2 V / 3 [Option ID = 21900]
2 V / 5 [Option ID = 21897]
[Question ID = 12981]
1. [Option ID = 21924]
2. [Option ID = 21922]
3. [Option ID = 21923]
4. [Option ID = 21921]
[Option ID = 21921]
21)
22)
[Question ID = 12935]
1. [Option ID = 21740]
2. [Option ID = 21738]
3. [Option ID = 21737]
4. [Option ID = 21739]
[Option ID = 21737]
[Question ID = 12941]
1. [Option ID = 21762]
2. [Option ID = 21761]
3. [Option ID = 21763]
4. [Option ID = 21764]
[Option ID = 21761]
[Question ID = 12934]
1. [Option ID = 21736]
2. [Option ID = 21733]
3. [Option ID = 21735]
4. [Option ID = 21734]
23)
24)
25)
[Option ID = 21733]
[Question ID = 12937]
1. [Option ID = 21747]
2. [Option ID = 21745]
3. [Option ID = 21746]
4. [Option ID = 21748]
[Option ID = 21745]
[Question ID = 12982]
1. [Option ID = 21926]
2. [Option ID = 21928]
3. [Option ID = 21927]
4. [Option ID = 21925]
[Option ID = 21925]
[Question ID = 12959]
1. [Option ID = 21834]
2. [Option ID = 21833]
3. [Option ID = 21835]
4. [Option ID = 21836]
26)
27)
28)
[Option ID = 21833]
[Question ID = 12952]
1. [Option ID = 21806]
2. [Option ID = 21808]
3. [Option ID = 21805]
4. [Option ID = 21807]
[Option ID = 21805]
[Question ID = 12940]
1. [Option ID = 21759]
2. [Option ID = 21757]
3. [Option ID = 21758]
4. [Option ID = 21760]
[Option ID = 21757]
[Question ID = 12963]
1. [Option ID = 21849]
2. [Option ID = 21851]
3. [Option ID = 21850]
4. [Option ID = 21852]
29)
30)
31)
[Option ID = 21849]
[Question ID = 12943]
1. 2 [Option ID = 21770]
2. 1/2 [Option ID = 21769]
3. 1 [Option ID = 21772]
4. 3/2 [Option ID = 21771]
1/2 [Option ID = 21769]
[Question ID = 12936]
1. [Option ID = 21742]
2. [Option ID = 21743]
3. [Option ID = 21741]
4. [Option ID = 21744]
[Option ID = 21741]
[Question ID = 12955]
1. [Option ID = 21820]
2. [Option ID = 21817]
3. [Option ID = 21819]
4. [Option ID = 21818]
32)
33)
34)
[Option ID = 21817]
[Question ID = 12954]
1. [Option ID = 21814]
2. [Option ID = 21815]
3. [Option ID = 21816]
4. [Option ID = 21813]
[Option ID = 21813]
[Question ID = 12938]
1. [Option ID = 21751]
2. [Option ID = 21750]
3. [Option ID = 21749]
4. [Option ID = 21752]
[Option ID = 21749]
[Question ID = 12962]
1. [Option ID = 21846]
35)
36)
37)
2. [Option ID = 21845]
3. [Option ID = 21847]
4. [Option ID = 21848]
[Option ID = 21845]
[Question ID = 12983]
1. an exponential amplifier [Option ID = 21929]
2. a half wave rectifier [Option ID = 21930]
3. a logarithmic amplifier [Option ID = 21932]
4. a differentiator [Option ID = 21931]
an exponential amplifier [Option ID = 21929]
[Question ID = 12939]
1. [Option ID = 21755]
2. [Option ID = 21753]
3. [Option ID = 21756]
4. [Option ID = 21754]
[Option ID = 21753]
[Question ID = 12951]
38)
39)
40)
1. [Option ID = 21802]
2. [Option ID = 21801]
3. [Option ID = 21803]
4. [Option ID = 21804]
[Option ID = 21801]
[Question ID = 12960]
1. [Option ID = 21837]
2. [Option ID = 21840]
3. [Option ID = 21838]
4. [Option ID = 21839]
[Option ID = 21837]
[Question ID = 12949]
1. [Option ID = 21796]
2. [Option ID = 21795]
3. [Option ID = 21794]
4. [Option ID = 21793]
[Option ID = 21793]

FirstRanker.com - FirstRanker's Choice
1)
2)
3)
4)
5)
DU MSc Physics
Topic:- DU_J19_MSC_PHY
In 2?s complement representation, the number 10110101 represents the decimal number
[Question ID = 12977]
1. -53 [Option ID = 21907]
2. 75 [Option ID = 21905]
3. 93 [Option ID = 21906]
4. -75 [Option ID = 21908]
75 [Option ID = 21905]
Water has a constant heat capacity of 4.2 J/K/kg over the temperature range 0?100 C. A kilogram of water, initially at
0 C is brought in contact with a heat reservoir at 100 C. When the water comes to equilibrium, what is the total change in
entropy of the universe?
[Question ID = 12978]
1. 2437.8 J/K [Option ID = 21909]
2. 1310.8 J/K [Option ID = 21911]
3. 184.8 J/K [Option ID = 21912]
4. 369.2 J/K [Option ID = 21910]
2437.8 J/K [Option ID = 21909]
The Sun is approximately 25,000 light years away from the centre of the Milky Way and moves around it, in an
approximately circular path, in roughly 170 million years. Given that sunlight takes approximately 8 min to reach the Earth,
what is the ratio of the masses of the galaxy and the Sun? [Question ID = 12944]
1. 1.5?10
12
[Option ID = 21775]
2. 1.5?10
11
[Option ID = 21773]
3. 5?10
11
[Option ID = 21774]
4. 5?10
10
[Option ID = 21776]
1.5?10
11
[Option ID = 21773]
An AND gate has two inputs A and B and one inhibit input S. The output is 1 if
[Question ID = 12980]
1. A = 1, B = 1, S = 1 [Option ID = 21918]
2. A = 1, B = 1, S = 0 [Option ID = 21920]
3. A = 1, B = 0, S = 0 [Option ID = 21917]
4. A = 1, B = 0, S = 1 [Option ID = 21919]
A = 1, B = 0, S = 0 [Option ID = 21917]
A wire carrying a current 2A is bent into the shape of a two semi circles, one with a radius 1m and the other with radius
2m . The two semi circles are connected at their ends that is along the two radii. The magnetic field at the center of the
semi-circles is
[Question ID = 12957]
1. ??10
-7
T [Option ID = 21827]
2. cannot be determined from the information provided above. [Option ID = 21828]
3. 16?10
-7
T [Option ID = 21825]
6)
7)
8)
9)
10)
4. 2?10
-7
T [Option ID = 21826]
16?10
-7
T [Option ID = 21825]
Under ideal conditions, the electric and magnetic fields inside a superconductor are zero. Which of the following must
be true just outside the surface of the superconductor?
[Question ID = 12974]
1. B =0 [Option ID = 21893]
2. B is perpendicular to the surface [Option ID = 21895]
3. B is tangential to the surface [Option ID = 21894]
4. The magnetic flux is quantized. [Option ID = 21896]
B =0 [Option ID = 21893]
Under certain conditions, a beam of electrons impinging on a crystal surface will diffract and a scattering pattern of the
beam can be obtained. What is the approximate kinetic energy of the electrons needed in order to see the pattern?
(Assume the lattice spacing of the crystal tobe 0.4 nm.)
[Question ID = 12973]
1. 100 eV [Option ID = 21892]
2. 1 eV [Option ID = 21890]
3. 0.1 eV [Option ID = 21889]
4. 10 eV [Option ID = 21891]
0.1 eV [Option ID = 21889]
Fermat?s principle of ray optics states, ?A ray oflight follows the path between two points which requires the least
time.? This principle can beused to derive which of the following?
I. Snell?s law of refraction
II. The law of reflection
III. Rayleigh?s criterion for resolution
[Question ID = 12972]
1. I and II [Option ID = 21885]
2. I only [Option ID = 21886]
3. I, II and III [Option ID = 21888]
4. II only [Option ID = 21887]
I and II [Option ID = 21885]
For a mole of ideal gas at T=35 C , what is the work done for an isothermal expansion from a volume V
0
to 10V
0
?
[Question ID = 12947]
1. 10
4
J [Option ID = 21785]
2. 10
3
J [Option ID = 21788]
3. 3?10
3
J [Option ID = 21787]
4. 6?10
3
J [Option ID = 21786]
10
4
J [Option ID = 21785]
A single photon of energy 100 MeV decays into an electron and a positron. Which of the following statements is true?
[Question ID = 12970]
1. It does not violate any of the above conservation laws. [Option ID = 21879]
2. This process violates energy momentum conservation. [Option ID = 21880]
3. This process violates angular momentum conservation. [Option ID = 21878]
4. This process violates lepton number conservation. [Option ID = 21877]
11)
12)
13)
14)
15)
This process violates lepton number conservation. [Option ID = 21877]
An electric field E can pull an electron out of a Helium atom in the same time that the electron takes to go around the
nucleus once. Then E is [Question ID = 12965]
1. 2?10
12
V/m [Option ID = 21860]
2. 5?10
11
V/m [Option ID = 21858]
3. 10
12
V/m [Option ID = 21859]
4. 10
13
V/m [Option ID = 21857]
10
13
V/m [Option ID = 21857]
A material has a heat capacity at constant volume C that is unchanging over a wide temperature range. Two identical
bodies made of this material, at initial temperatures T and 9T , respectively, are used to drive a heat engine. The maximum
amount of work that can be obtained from this engine is
[Question ID = 12979]
1. 9 C T [Option ID = 21915]
2. 4 C T [Option ID = 21914]
3. 8 C T [Option ID = 21913]
4. 3 C T [Option ID = 21916]
8 C T [Option ID = 21913]
An electrical device operates on 9 V and has a resistance of 21?. It is connected to a power supply of 120 V output
through a transformer. The current in the primary of the transformer is [Question ID = 12971]
1. 0.032 A [Option ID = 21882]
2. Cannot be determined from the information supplied. [Option ID = 21884]
3. 0.23 A [Option ID = 21883]
4. 2.32 A [Option ID = 21881]
2.32 A [Option ID = 21881]
The frequency of oscillation of an LC circuit is ? . The plates of the parallel plate capacitor are pulled apart to twice the
original distance and a dielectric with dielectric constant k is inserted. The frequency of oscillation for the new
configuration is [Question ID = 12961]
1. [Option ID = 21841]
2. [Option ID = 21844]
3. [Option ID = 21842]
4. [Option ID = 21843]
[Option ID = 21841]
One mole of a monoatomic perfect gas is initially at a constant temperature T
0
. It expands from a volume V
0
to 2V
0
under constant pressure. The heat absorbed by the gas is [Question ID = 12946]
1. [Option ID = 21781]
2. [Option ID = 21783]
3. [Option ID = 21784]
4. [Option ID = 21782]
16)
17)
18)
19)
20)
[Option ID = 21781]
A scalar meson decays into three pseudoscalar mesons. The decay happens through [Question ID = 12968]
1. strong interaction [Option ID = 21870]
2. weak interaction [Option ID = 21869]
3. gravitational interaction [Option ID = 21872]
4. electromagnetic interaction [Option ID = 21871]
weak interaction [Option ID = 21869]
An ideal monoatomic gas, initially at T=20 C , expands adiabatically from a volume V
0
to 5V
0
. What is the final
temperature [Question ID = 12948]
1. -33 C [Option ID = 21792]
2. -113 C [Option ID = 21791]
3. -20 C [Option ID = 21789]
4. -173 C [Option ID = 21790]
-20 C [Option ID = 21789]
Consider three identical, ideal capacitors. The first capacitoris charged to a voltage V and then disconnected from the
battery.The other two capacitors, initially uncharged and connected in series, are then connected across the first. What is
the final voltage across the first capacitor?
[Question ID = 12975]
1. V / 3 [Option ID = 21899]
2. V [Option ID = 21898]
3. 2 V / 5 [Option ID = 21897]
4. 2 V / 3 [Option ID = 21900]
2 V / 5 [Option ID = 21897]
[Question ID = 12981]
1. [Option ID = 21924]
2. [Option ID = 21922]
3. [Option ID = 21923]
4. [Option ID = 21921]
[Option ID = 21921]
21)
22)
[Question ID = 12935]
1. [Option ID = 21740]
2. [Option ID = 21738]
3. [Option ID = 21737]
4. [Option ID = 21739]
[Option ID = 21737]
[Question ID = 12941]
1. [Option ID = 21762]
2. [Option ID = 21761]
3. [Option ID = 21763]
4. [Option ID = 21764]
[Option ID = 21761]
[Question ID = 12934]
1. [Option ID = 21736]
2. [Option ID = 21733]
3. [Option ID = 21735]
4. [Option ID = 21734]
23)
24)
25)
[Option ID = 21733]
[Question ID = 12937]
1. [Option ID = 21747]
2. [Option ID = 21745]
3. [Option ID = 21746]
4. [Option ID = 21748]
[Option ID = 21745]
[Question ID = 12982]
1. [Option ID = 21926]
2. [Option ID = 21928]
3. [Option ID = 21927]
4. [Option ID = 21925]
[Option ID = 21925]
[Question ID = 12959]
1. [Option ID = 21834]
2. [Option ID = 21833]
3. [Option ID = 21835]
4. [Option ID = 21836]
26)
27)
28)
[Option ID = 21833]
[Question ID = 12952]
1. [Option ID = 21806]
2. [Option ID = 21808]
3. [Option ID = 21805]
4. [Option ID = 21807]
[Option ID = 21805]
[Question ID = 12940]
1. [Option ID = 21759]
2. [Option ID = 21757]
3. [Option ID = 21758]
4. [Option ID = 21760]
[Option ID = 21757]
[Question ID = 12963]
1. [Option ID = 21849]
2. [Option ID = 21851]
3. [Option ID = 21850]
4. [Option ID = 21852]
29)
30)
31)
[Option ID = 21849]
[Question ID = 12943]
1. 2 [Option ID = 21770]
2. 1/2 [Option ID = 21769]
3. 1 [Option ID = 21772]
4. 3/2 [Option ID = 21771]
1/2 [Option ID = 21769]
[Question ID = 12936]
1. [Option ID = 21742]
2. [Option ID = 21743]
3. [Option ID = 21741]
4. [Option ID = 21744]
[Option ID = 21741]
[Question ID = 12955]
1. [Option ID = 21820]
2. [Option ID = 21817]
3. [Option ID = 21819]
4. [Option ID = 21818]
32)
33)
34)
[Option ID = 21817]
[Question ID = 12954]
1. [Option ID = 21814]
2. [Option ID = 21815]
3. [Option ID = 21816]
4. [Option ID = 21813]
[Option ID = 21813]
[Question ID = 12938]
1. [Option ID = 21751]
2. [Option ID = 21750]
3. [Option ID = 21749]
4. [Option ID = 21752]
[Option ID = 21749]
[Question ID = 12962]
1. [Option ID = 21846]
35)
36)
37)
2. [Option ID = 21845]
3. [Option ID = 21847]
4. [Option ID = 21848]
[Option ID = 21845]
[Question ID = 12983]
1. an exponential amplifier [Option ID = 21929]
2. a half wave rectifier [Option ID = 21930]
3. a logarithmic amplifier [Option ID = 21932]
4. a differentiator [Option ID = 21931]
an exponential amplifier [Option ID = 21929]
[Question ID = 12939]
1. [Option ID = 21755]
2. [Option ID = 21753]
3. [Option ID = 21756]
4. [Option ID = 21754]
[Option ID = 21753]
[Question ID = 12951]
38)
39)
40)
1. [Option ID = 21802]
2. [Option ID = 21801]
3. [Option ID = 21803]
4. [Option ID = 21804]
[Option ID = 21801]
[Question ID = 12960]
1. [Option ID = 21837]
2. [Option ID = 21840]
3. [Option ID = 21838]
4. [Option ID = 21839]
[Option ID = 21837]
[Question ID = 12949]
1. [Option ID = 21796]
2. [Option ID = 21795]
3. [Option ID = 21794]
4. [Option ID = 21793]
[Option ID = 21793]
41)
42)
43)
[Question ID = 12945]
1. [Option ID = 21778]
2. [Option ID = 21777]
3. [Option ID = 21779]
4. [Option ID = 21780]
[Option ID = 21777]
[Question ID = 12956]
1. x = 0 [Option ID = 21823]
2. None of these [Option ID = 21824]
3. x = 1/? [Option ID = 21821]
4. x = 1 [Option ID = 21822]
x = 1/? [Option ID = 21821]
A self-contained machine has, as its input, two equal steady stream of a fluid at temperatures T
1
and 4T
1
respectively.
The only output is a single high-speed jet of the same fluid at temperature T . The heat capacity per unit mass of the fluid is
C (and is independent of the temperature). What is the maximum possible speed of the jet? [Question ID = 12950]
1. [Option ID = 21798]
2. [Option ID = 21799]
3. [Option ID = 21800]
4. [Option ID = 21797]
[Option ID = 21797]
A particle of mass M decays at rest into two particles. One particle has mass m and the other particle is massless. The
momentum of the massless particle is [Question ID = 12958]
1. [Option ID = 21830]
2. [Option ID = 21831]
3. [Option ID = 21832]

FirstRanker.com - FirstRanker's Choice
1)
2)
3)
4)
5)
DU MSc Physics
Topic:- DU_J19_MSC_PHY
In 2?s complement representation, the number 10110101 represents the decimal number
[Question ID = 12977]
1. -53 [Option ID = 21907]
2. 75 [Option ID = 21905]
3. 93 [Option ID = 21906]
4. -75 [Option ID = 21908]
75 [Option ID = 21905]
Water has a constant heat capacity of 4.2 J/K/kg over the temperature range 0?100 C. A kilogram of water, initially at
0 C is brought in contact with a heat reservoir at 100 C. When the water comes to equilibrium, what is the total change in
entropy of the universe?
[Question ID = 12978]
1. 2437.8 J/K [Option ID = 21909]
2. 1310.8 J/K [Option ID = 21911]
3. 184.8 J/K [Option ID = 21912]
4. 369.2 J/K [Option ID = 21910]
2437.8 J/K [Option ID = 21909]
The Sun is approximately 25,000 light years away from the centre of the Milky Way and moves around it, in an
approximately circular path, in roughly 170 million years. Given that sunlight takes approximately 8 min to reach the Earth,
what is the ratio of the masses of the galaxy and the Sun? [Question ID = 12944]
1. 1.5?10
12
[Option ID = 21775]
2. 1.5?10
11
[Option ID = 21773]
3. 5?10
11
[Option ID = 21774]
4. 5?10
10
[Option ID = 21776]
1.5?10
11
[Option ID = 21773]
An AND gate has two inputs A and B and one inhibit input S. The output is 1 if
[Question ID = 12980]
1. A = 1, B = 1, S = 1 [Option ID = 21918]
2. A = 1, B = 1, S = 0 [Option ID = 21920]
3. A = 1, B = 0, S = 0 [Option ID = 21917]
4. A = 1, B = 0, S = 1 [Option ID = 21919]
A = 1, B = 0, S = 0 [Option ID = 21917]
A wire carrying a current 2A is bent into the shape of a two semi circles, one with a radius 1m and the other with radius
2m . The two semi circles are connected at their ends that is along the two radii. The magnetic field at the center of the
semi-circles is
[Question ID = 12957]
1. ??10
-7
T [Option ID = 21827]
2. cannot be determined from the information provided above. [Option ID = 21828]
3. 16?10
-7
T [Option ID = 21825]
6)
7)
8)
9)
10)
4. 2?10
-7
T [Option ID = 21826]
16?10
-7
T [Option ID = 21825]
Under ideal conditions, the electric and magnetic fields inside a superconductor are zero. Which of the following must
be true just outside the surface of the superconductor?
[Question ID = 12974]
1. B =0 [Option ID = 21893]
2. B is perpendicular to the surface [Option ID = 21895]
3. B is tangential to the surface [Option ID = 21894]
4. The magnetic flux is quantized. [Option ID = 21896]
B =0 [Option ID = 21893]
Under certain conditions, a beam of electrons impinging on a crystal surface will diffract and a scattering pattern of the
beam can be obtained. What is the approximate kinetic energy of the electrons needed in order to see the pattern?
(Assume the lattice spacing of the crystal tobe 0.4 nm.)
[Question ID = 12973]
1. 100 eV [Option ID = 21892]
2. 1 eV [Option ID = 21890]
3. 0.1 eV [Option ID = 21889]
4. 10 eV [Option ID = 21891]
0.1 eV [Option ID = 21889]
Fermat?s principle of ray optics states, ?A ray oflight follows the path between two points which requires the least
time.? This principle can beused to derive which of the following?
I. Snell?s law of refraction
II. The law of reflection
III. Rayleigh?s criterion for resolution
[Question ID = 12972]
1. I and II [Option ID = 21885]
2. I only [Option ID = 21886]
3. I, II and III [Option ID = 21888]
4. II only [Option ID = 21887]
I and II [Option ID = 21885]
For a mole of ideal gas at T=35 C , what is the work done for an isothermal expansion from a volume V
0
to 10V
0
?
[Question ID = 12947]
1. 10
4
J [Option ID = 21785]
2. 10
3
J [Option ID = 21788]
3. 3?10
3
J [Option ID = 21787]
4. 6?10
3
J [Option ID = 21786]
10
4
J [Option ID = 21785]
A single photon of energy 100 MeV decays into an electron and a positron. Which of the following statements is true?
[Question ID = 12970]
1. It does not violate any of the above conservation laws. [Option ID = 21879]
2. This process violates energy momentum conservation. [Option ID = 21880]
3. This process violates angular momentum conservation. [Option ID = 21878]
4. This process violates lepton number conservation. [Option ID = 21877]
11)
12)
13)
14)
15)
This process violates lepton number conservation. [Option ID = 21877]
An electric field E can pull an electron out of a Helium atom in the same time that the electron takes to go around the
nucleus once. Then E is [Question ID = 12965]
1. 2?10
12
V/m [Option ID = 21860]
2. 5?10
11
V/m [Option ID = 21858]
3. 10
12
V/m [Option ID = 21859]
4. 10
13
V/m [Option ID = 21857]
10
13
V/m [Option ID = 21857]
A material has a heat capacity at constant volume C that is unchanging over a wide temperature range. Two identical
bodies made of this material, at initial temperatures T and 9T , respectively, are used to drive a heat engine. The maximum
amount of work that can be obtained from this engine is
[Question ID = 12979]
1. 9 C T [Option ID = 21915]
2. 4 C T [Option ID = 21914]
3. 8 C T [Option ID = 21913]
4. 3 C T [Option ID = 21916]
8 C T [Option ID = 21913]
An electrical device operates on 9 V and has a resistance of 21?. It is connected to a power supply of 120 V output
through a transformer. The current in the primary of the transformer is [Question ID = 12971]
1. 0.032 A [Option ID = 21882]
2. Cannot be determined from the information supplied. [Option ID = 21884]
3. 0.23 A [Option ID = 21883]
4. 2.32 A [Option ID = 21881]
2.32 A [Option ID = 21881]
The frequency of oscillation of an LC circuit is ? . The plates of the parallel plate capacitor are pulled apart to twice the
original distance and a dielectric with dielectric constant k is inserted. The frequency of oscillation for the new
configuration is [Question ID = 12961]
1. [Option ID = 21841]
2. [Option ID = 21844]
3. [Option ID = 21842]
4. [Option ID = 21843]
[Option ID = 21841]
One mole of a monoatomic perfect gas is initially at a constant temperature T
0
. It expands from a volume V
0
to 2V
0
under constant pressure. The heat absorbed by the gas is [Question ID = 12946]
1. [Option ID = 21781]
2. [Option ID = 21783]
3. [Option ID = 21784]
4. [Option ID = 21782]
16)
17)
18)
19)
20)
[Option ID = 21781]
A scalar meson decays into three pseudoscalar mesons. The decay happens through [Question ID = 12968]
1. strong interaction [Option ID = 21870]
2. weak interaction [Option ID = 21869]
3. gravitational interaction [Option ID = 21872]
4. electromagnetic interaction [Option ID = 21871]
weak interaction [Option ID = 21869]
An ideal monoatomic gas, initially at T=20 C , expands adiabatically from a volume V
0
to 5V
0
. What is the final
temperature [Question ID = 12948]
1. -33 C [Option ID = 21792]
2. -113 C [Option ID = 21791]
3. -20 C [Option ID = 21789]
4. -173 C [Option ID = 21790]
-20 C [Option ID = 21789]
Consider three identical, ideal capacitors. The first capacitoris charged to a voltage V and then disconnected from the
battery.The other two capacitors, initially uncharged and connected in series, are then connected across the first. What is
the final voltage across the first capacitor?
[Question ID = 12975]
1. V / 3 [Option ID = 21899]
2. V [Option ID = 21898]
3. 2 V / 5 [Option ID = 21897]
4. 2 V / 3 [Option ID = 21900]
2 V / 5 [Option ID = 21897]
[Question ID = 12981]
1. [Option ID = 21924]
2. [Option ID = 21922]
3. [Option ID = 21923]
4. [Option ID = 21921]
[Option ID = 21921]
21)
22)
[Question ID = 12935]
1. [Option ID = 21740]
2. [Option ID = 21738]
3. [Option ID = 21737]
4. [Option ID = 21739]
[Option ID = 21737]
[Question ID = 12941]
1. [Option ID = 21762]
2. [Option ID = 21761]
3. [Option ID = 21763]
4. [Option ID = 21764]
[Option ID = 21761]
[Question ID = 12934]
1. [Option ID = 21736]
2. [Option ID = 21733]
3. [Option ID = 21735]
4. [Option ID = 21734]
23)
24)
25)
[Option ID = 21733]
[Question ID = 12937]
1. [Option ID = 21747]
2. [Option ID = 21745]
3. [Option ID = 21746]
4. [Option ID = 21748]
[Option ID = 21745]
[Question ID = 12982]
1. [Option ID = 21926]
2. [Option ID = 21928]
3. [Option ID = 21927]
4. [Option ID = 21925]
[Option ID = 21925]
[Question ID = 12959]
1. [Option ID = 21834]
2. [Option ID = 21833]
3. [Option ID = 21835]
4. [Option ID = 21836]
26)
27)
28)
[Option ID = 21833]
[Question ID = 12952]
1. [Option ID = 21806]
2. [Option ID = 21808]
3. [Option ID = 21805]
4. [Option ID = 21807]
[Option ID = 21805]
[Question ID = 12940]
1. [Option ID = 21759]
2. [Option ID = 21757]
3. [Option ID = 21758]
4. [Option ID = 21760]
[Option ID = 21757]
[Question ID = 12963]
1. [Option ID = 21849]
2. [Option ID = 21851]
3. [Option ID = 21850]
4. [Option ID = 21852]
29)
30)
31)
[Option ID = 21849]
[Question ID = 12943]
1. 2 [Option ID = 21770]
2. 1/2 [Option ID = 21769]
3. 1 [Option ID = 21772]
4. 3/2 [Option ID = 21771]
1/2 [Option ID = 21769]
[Question ID = 12936]
1. [Option ID = 21742]
2. [Option ID = 21743]
3. [Option ID = 21741]
4. [Option ID = 21744]
[Option ID = 21741]
[Question ID = 12955]
1. [Option ID = 21820]
2. [Option ID = 21817]
3. [Option ID = 21819]
4. [Option ID = 21818]
32)
33)
34)
[Option ID = 21817]
[Question ID = 12954]
1. [Option ID = 21814]
2. [Option ID = 21815]
3. [Option ID = 21816]
4. [Option ID = 21813]
[Option ID = 21813]
[Question ID = 12938]
1. [Option ID = 21751]
2. [Option ID = 21750]
3. [Option ID = 21749]
4. [Option ID = 21752]
[Option ID = 21749]
[Question ID = 12962]
1. [Option ID = 21846]
35)
36)
37)
2. [Option ID = 21845]
3. [Option ID = 21847]
4. [Option ID = 21848]
[Option ID = 21845]
[Question ID = 12983]
1. an exponential amplifier [Option ID = 21929]
2. a half wave rectifier [Option ID = 21930]
3. a logarithmic amplifier [Option ID = 21932]
4. a differentiator [Option ID = 21931]
an exponential amplifier [Option ID = 21929]
[Question ID = 12939]
1. [Option ID = 21755]
2. [Option ID = 21753]
3. [Option ID = 21756]
4. [Option ID = 21754]
[Option ID = 21753]
[Question ID = 12951]
38)
39)
40)
1. [Option ID = 21802]
2. [Option ID = 21801]
3. [Option ID = 21803]
4. [Option ID = 21804]
[Option ID = 21801]
[Question ID = 12960]
1. [Option ID = 21837]
2. [Option ID = 21840]
3. [Option ID = 21838]
4. [Option ID = 21839]
[Option ID = 21837]
[Question ID = 12949]
1. [Option ID = 21796]
2. [Option ID = 21795]
3. [Option ID = 21794]
4. [Option ID = 21793]
[Option ID = 21793]
41)
42)
43)
[Question ID = 12945]
1. [Option ID = 21778]
2. [Option ID = 21777]
3. [Option ID = 21779]
4. [Option ID = 21780]
[Option ID = 21777]
[Question ID = 12956]
1. x = 0 [Option ID = 21823]
2. None of these [Option ID = 21824]
3. x = 1/? [Option ID = 21821]
4. x = 1 [Option ID = 21822]
x = 1/? [Option ID = 21821]
A self-contained machine has, as its input, two equal steady stream of a fluid at temperatures T
1
and 4T
1
respectively.
The only output is a single high-speed jet of the same fluid at temperature T . The heat capacity per unit mass of the fluid is
C (and is independent of the temperature). What is the maximum possible speed of the jet? [Question ID = 12950]
1. [Option ID = 21798]
2. [Option ID = 21799]
3. [Option ID = 21800]
4. [Option ID = 21797]
[Option ID = 21797]
A particle of mass M decays at rest into two particles. One particle has mass m and the other particle is massless. The
momentum of the massless particle is [Question ID = 12958]
1. [Option ID = 21830]
2. [Option ID = 21831]
3. [Option ID = 21832]
44)
45)
46)
47)
4. [Option ID = 21829]
[Option ID = 21829]
The distribution of weights of 100 students in a class follows normal distribution with a mean of 58 kg and a standard
deviation of 25 kg. How many students have weights in the range 53 ? 63 kg ? [Question ID = 12967]
1. 32 [Option ID = 21866]
2. 68 [Option ID = 21867]
3. 99 [Option ID = 21868]
4. 88 [Option ID = 21865]
88 [Option ID = 21865]
A gas cell with an optical path length of 10 cm is placed in one arm of a Michelson interferometer. If the light source
for the interferometer is a laser with a wavelength of 632.2 nm, then 100 fringes are counted as the gas cell is evacuated.
What isthe index of refraction of the original gas?
[Question ID = 12976]
1. 0.99968 [Option ID = 21904]
2. 1.00063 [Option ID = 21902]
3. 1.00032 [Option ID = 21903]
4. 1.00016 [Option ID = 21901]
1.00016 [Option ID = 21901]
A child of mass 3m sits on a swing, the base of which has mass m , while the rope (of length l) has a negligible mass.
An older child pulls back the swing (with the child) until the rope makes an angle of half-a-radian with the vertical, and,
then, pushes with a force mg along the arc of a circle until the rope is exactly vertical, and releases it. If the rope was
always taut, for how long did the child push?
[Question ID = 12942]
1. [Option ID = 21767]
2. [Option ID = 21768]
3. [Option ID = 21766]
4. [Option ID = 21765]
[Option ID = 21765]
X-rays undergo Bragg reflection from a simple cubic crystal, with a density known with an accuracy of one percent. If
the angle of the reflected X-ray with the crystal plane is 6? and is measured with an accuracy of 3 minutes of arc, what is
the relative error in the measurement of wavelength? [Question ID = 12964]
1. 5.6?10
-3
[Option ID = 21853]
2. 1.1?10
-2
[Option ID = 21855]

FirstRanker.com - FirstRanker's Choice
1)
2)
3)
4)
5)
DU MSc Physics
Topic:- DU_J19_MSC_PHY
In 2?s complement representation, the number 10110101 represents the decimal number
[Question ID = 12977]
1. -53 [Option ID = 21907]
2. 75 [Option ID = 21905]
3. 93 [Option ID = 21906]
4. -75 [Option ID = 21908]
75 [Option ID = 21905]
Water has a constant heat capacity of 4.2 J/K/kg over the temperature range 0?100 C. A kilogram of water, initially at
0 C is brought in contact with a heat reservoir at 100 C. When the water comes to equilibrium, what is the total change in
entropy of the universe?
[Question ID = 12978]
1. 2437.8 J/K [Option ID = 21909]
2. 1310.8 J/K [Option ID = 21911]
3. 184.8 J/K [Option ID = 21912]
4. 369.2 J/K [Option ID = 21910]
2437.8 J/K [Option ID = 21909]
The Sun is approximately 25,000 light years away from the centre of the Milky Way and moves around it, in an
approximately circular path, in roughly 170 million years. Given that sunlight takes approximately 8 min to reach the Earth,
what is the ratio of the masses of the galaxy and the Sun? [Question ID = 12944]
1. 1.5?10
12
[Option ID = 21775]
2. 1.5?10
11
[Option ID = 21773]
3. 5?10
11
[Option ID = 21774]
4. 5?10
10
[Option ID = 21776]
1.5?10
11
[Option ID = 21773]
An AND gate has two inputs A and B and one inhibit input S. The output is 1 if
[Question ID = 12980]
1. A = 1, B = 1, S = 1 [Option ID = 21918]
2. A = 1, B = 1, S = 0 [Option ID = 21920]
3. A = 1, B = 0, S = 0 [Option ID = 21917]
4. A = 1, B = 0, S = 1 [Option ID = 21919]
A = 1, B = 0, S = 0 [Option ID = 21917]
A wire carrying a current 2A is bent into the shape of a two semi circles, one with a radius 1m and the other with radius
2m . The two semi circles are connected at their ends that is along the two radii. The magnetic field at the center of the
semi-circles is
[Question ID = 12957]
1. ??10
-7
T [Option ID = 21827]
2. cannot be determined from the information provided above. [Option ID = 21828]
3. 16?10
-7
T [Option ID = 21825]
6)
7)
8)
9)
10)
4. 2?10
-7
T [Option ID = 21826]
16?10
-7
T [Option ID = 21825]
Under ideal conditions, the electric and magnetic fields inside a superconductor are zero. Which of the following must
be true just outside the surface of the superconductor?
[Question ID = 12974]
1. B =0 [Option ID = 21893]
2. B is perpendicular to the surface [Option ID = 21895]
3. B is tangential to the surface [Option ID = 21894]
4. The magnetic flux is quantized. [Option ID = 21896]
B =0 [Option ID = 21893]
Under certain conditions, a beam of electrons impinging on a crystal surface will diffract and a scattering pattern of the
beam can be obtained. What is the approximate kinetic energy of the electrons needed in order to see the pattern?
(Assume the lattice spacing of the crystal tobe 0.4 nm.)
[Question ID = 12973]
1. 100 eV [Option ID = 21892]
2. 1 eV [Option ID = 21890]
3. 0.1 eV [Option ID = 21889]
4. 10 eV [Option ID = 21891]
0.1 eV [Option ID = 21889]
Fermat?s principle of ray optics states, ?A ray oflight follows the path between two points which requires the least
time.? This principle can beused to derive which of the following?
I. Snell?s law of refraction
II. The law of reflection
III. Rayleigh?s criterion for resolution
[Question ID = 12972]
1. I and II [Option ID = 21885]
2. I only [Option ID = 21886]
3. I, II and III [Option ID = 21888]
4. II only [Option ID = 21887]
I and II [Option ID = 21885]
For a mole of ideal gas at T=35 C , what is the work done for an isothermal expansion from a volume V
0
to 10V
0
?
[Question ID = 12947]
1. 10
4
J [Option ID = 21785]
2. 10
3
J [Option ID = 21788]
3. 3?10
3
J [Option ID = 21787]
4. 6?10
3
J [Option ID = 21786]
10
4
J [Option ID = 21785]
A single photon of energy 100 MeV decays into an electron and a positron. Which of the following statements is true?
[Question ID = 12970]
1. It does not violate any of the above conservation laws. [Option ID = 21879]
2. This process violates energy momentum conservation. [Option ID = 21880]
3. This process violates angular momentum conservation. [Option ID = 21878]
4. This process violates lepton number conservation. [Option ID = 21877]
11)
12)
13)
14)
15)
This process violates lepton number conservation. [Option ID = 21877]
An electric field E can pull an electron out of a Helium atom in the same time that the electron takes to go around the
nucleus once. Then E is [Question ID = 12965]
1. 2?10
12
V/m [Option ID = 21860]
2. 5?10
11
V/m [Option ID = 21858]
3. 10
12
V/m [Option ID = 21859]
4. 10
13
V/m [Option ID = 21857]
10
13
V/m [Option ID = 21857]
A material has a heat capacity at constant volume C that is unchanging over a wide temperature range. Two identical
bodies made of this material, at initial temperatures T and 9T , respectively, are used to drive a heat engine. The maximum
amount of work that can be obtained from this engine is
[Question ID = 12979]
1. 9 C T [Option ID = 21915]
2. 4 C T [Option ID = 21914]
3. 8 C T [Option ID = 21913]
4. 3 C T [Option ID = 21916]
8 C T [Option ID = 21913]
An electrical device operates on 9 V and has a resistance of 21?. It is connected to a power supply of 120 V output
through a transformer. The current in the primary of the transformer is [Question ID = 12971]
1. 0.032 A [Option ID = 21882]
2. Cannot be determined from the information supplied. [Option ID = 21884]
3. 0.23 A [Option ID = 21883]
4. 2.32 A [Option ID = 21881]
2.32 A [Option ID = 21881]
The frequency of oscillation of an LC circuit is ? . The plates of the parallel plate capacitor are pulled apart to twice the
original distance and a dielectric with dielectric constant k is inserted. The frequency of oscillation for the new
configuration is [Question ID = 12961]
1. [Option ID = 21841]
2. [Option ID = 21844]
3. [Option ID = 21842]
4. [Option ID = 21843]
[Option ID = 21841]
One mole of a monoatomic perfect gas is initially at a constant temperature T
0
. It expands from a volume V
0
to 2V
0
under constant pressure. The heat absorbed by the gas is [Question ID = 12946]
1. [Option ID = 21781]
2. [Option ID = 21783]
3. [Option ID = 21784]
4. [Option ID = 21782]
16)
17)
18)
19)
20)
[Option ID = 21781]
A scalar meson decays into three pseudoscalar mesons. The decay happens through [Question ID = 12968]
1. strong interaction [Option ID = 21870]
2. weak interaction [Option ID = 21869]
3. gravitational interaction [Option ID = 21872]
4. electromagnetic interaction [Option ID = 21871]
weak interaction [Option ID = 21869]
An ideal monoatomic gas, initially at T=20 C , expands adiabatically from a volume V
0
to 5V
0
. What is the final
temperature [Question ID = 12948]
1. -33 C [Option ID = 21792]
2. -113 C [Option ID = 21791]
3. -20 C [Option ID = 21789]
4. -173 C [Option ID = 21790]
-20 C [Option ID = 21789]
Consider three identical, ideal capacitors. The first capacitoris charged to a voltage V and then disconnected from the
battery.The other two capacitors, initially uncharged and connected in series, are then connected across the first. What is
the final voltage across the first capacitor?
[Question ID = 12975]
1. V / 3 [Option ID = 21899]
2. V [Option ID = 21898]
3. 2 V / 5 [Option ID = 21897]
4. 2 V / 3 [Option ID = 21900]
2 V / 5 [Option ID = 21897]
[Question ID = 12981]
1. [Option ID = 21924]
2. [Option ID = 21922]
3. [Option ID = 21923]
4. [Option ID = 21921]
[Option ID = 21921]
21)
22)
[Question ID = 12935]
1. [Option ID = 21740]
2. [Option ID = 21738]
3. [Option ID = 21737]
4. [Option ID = 21739]
[Option ID = 21737]
[Question ID = 12941]
1. [Option ID = 21762]
2. [Option ID = 21761]
3. [Option ID = 21763]
4. [Option ID = 21764]
[Option ID = 21761]
[Question ID = 12934]
1. [Option ID = 21736]
2. [Option ID = 21733]
3. [Option ID = 21735]
4. [Option ID = 21734]
23)
24)
25)
[Option ID = 21733]
[Question ID = 12937]
1. [Option ID = 21747]
2. [Option ID = 21745]
3. [Option ID = 21746]
4. [Option ID = 21748]
[Option ID = 21745]
[Question ID = 12982]
1. [Option ID = 21926]
2. [Option ID = 21928]
3. [Option ID = 21927]
4. [Option ID = 21925]
[Option ID = 21925]
[Question ID = 12959]
1. [Option ID = 21834]
2. [Option ID = 21833]
3. [Option ID = 21835]
4. [Option ID = 21836]
26)
27)
28)
[Option ID = 21833]
[Question ID = 12952]
1. [Option ID = 21806]
2. [Option ID = 21808]
3. [Option ID = 21805]
4. [Option ID = 21807]
[Option ID = 21805]
[Question ID = 12940]
1. [Option ID = 21759]
2. [Option ID = 21757]
3. [Option ID = 21758]
4. [Option ID = 21760]
[Option ID = 21757]
[Question ID = 12963]
1. [Option ID = 21849]
2. [Option ID = 21851]
3. [Option ID = 21850]
4. [Option ID = 21852]
29)
30)
31)
[Option ID = 21849]
[Question ID = 12943]
1. 2 [Option ID = 21770]
2. 1/2 [Option ID = 21769]
3. 1 [Option ID = 21772]
4. 3/2 [Option ID = 21771]
1/2 [Option ID = 21769]
[Question ID = 12936]
1. [Option ID = 21742]
2. [Option ID = 21743]
3. [Option ID = 21741]
4. [Option ID = 21744]
[Option ID = 21741]
[Question ID = 12955]
1. [Option ID = 21820]
2. [Option ID = 21817]
3. [Option ID = 21819]
4. [Option ID = 21818]
32)
33)
34)
[Option ID = 21817]
[Question ID = 12954]
1. [Option ID = 21814]
2. [Option ID = 21815]
3. [Option ID = 21816]
4. [Option ID = 21813]
[Option ID = 21813]
[Question ID = 12938]
1. [Option ID = 21751]
2. [Option ID = 21750]
3. [Option ID = 21749]
4. [Option ID = 21752]
[Option ID = 21749]
[Question ID = 12962]
1. [Option ID = 21846]
35)
36)
37)
2. [Option ID = 21845]
3. [Option ID = 21847]
4. [Option ID = 21848]
[Option ID = 21845]
[Question ID = 12983]
1. an exponential amplifier [Option ID = 21929]
2. a half wave rectifier [Option ID = 21930]
3. a logarithmic amplifier [Option ID = 21932]
4. a differentiator [Option ID = 21931]
an exponential amplifier [Option ID = 21929]
[Question ID = 12939]
1. [Option ID = 21755]
2. [Option ID = 21753]
3. [Option ID = 21756]
4. [Option ID = 21754]
[Option ID = 21753]
[Question ID = 12951]
38)
39)
40)
1. [Option ID = 21802]
2. [Option ID = 21801]
3. [Option ID = 21803]
4. [Option ID = 21804]
[Option ID = 21801]
[Question ID = 12960]
1. [Option ID = 21837]
2. [Option ID = 21840]
3. [Option ID = 21838]
4. [Option ID = 21839]
[Option ID = 21837]
[Question ID = 12949]
1. [Option ID = 21796]
2. [Option ID = 21795]
3. [Option ID = 21794]
4. [Option ID = 21793]
[Option ID = 21793]
41)
42)
43)
[Question ID = 12945]
1. [Option ID = 21778]
2. [Option ID = 21777]
3. [Option ID = 21779]
4. [Option ID = 21780]
[Option ID = 21777]
[Question ID = 12956]
1. x = 0 [Option ID = 21823]
2. None of these [Option ID = 21824]
3. x = 1/? [Option ID = 21821]
4. x = 1 [Option ID = 21822]
x = 1/? [Option ID = 21821]
A self-contained machine has, as its input, two equal steady stream of a fluid at temperatures T
1
and 4T
1
respectively.
The only output is a single high-speed jet of the same fluid at temperature T . The heat capacity per unit mass of the fluid is
C (and is independent of the temperature). What is the maximum possible speed of the jet? [Question ID = 12950]
1. [Option ID = 21798]
2. [Option ID = 21799]
3. [Option ID = 21800]
4. [Option ID = 21797]
[Option ID = 21797]
A particle of mass M decays at rest into two particles. One particle has mass m and the other particle is massless. The
momentum of the massless particle is [Question ID = 12958]
1. [Option ID = 21830]
2. [Option ID = 21831]
3. [Option ID = 21832]
44)
45)
46)
47)
4. [Option ID = 21829]
[Option ID = 21829]
The distribution of weights of 100 students in a class follows normal distribution with a mean of 58 kg and a standard
deviation of 25 kg. How many students have weights in the range 53 ? 63 kg ? [Question ID = 12967]
1. 32 [Option ID = 21866]
2. 68 [Option ID = 21867]
3. 99 [Option ID = 21868]
4. 88 [Option ID = 21865]
88 [Option ID = 21865]
A gas cell with an optical path length of 10 cm is placed in one arm of a Michelson interferometer. If the light source
for the interferometer is a laser with a wavelength of 632.2 nm, then 100 fringes are counted as the gas cell is evacuated.
What isthe index of refraction of the original gas?
[Question ID = 12976]
1. 0.99968 [Option ID = 21904]
2. 1.00063 [Option ID = 21902]
3. 1.00032 [Option ID = 21903]
4. 1.00016 [Option ID = 21901]
1.00016 [Option ID = 21901]
A child of mass 3m sits on a swing, the base of which has mass m , while the rope (of length l) has a negligible mass.
An older child pulls back the swing (with the child) until the rope makes an angle of half-a-radian with the vertical, and,
then, pushes with a force mg along the arc of a circle until the rope is exactly vertical, and releases it. If the rope was
always taut, for how long did the child push?
[Question ID = 12942]
1. [Option ID = 21767]
2. [Option ID = 21768]
3. [Option ID = 21766]
4. [Option ID = 21765]
[Option ID = 21765]
X-rays undergo Bragg reflection from a simple cubic crystal, with a density known with an accuracy of one percent. If
the angle of the reflected X-ray with the crystal plane is 6? and is measured with an accuracy of 3 minutes of arc, what is
the relative error in the measurement of wavelength? [Question ID = 12964]
1. 5.6?10
-3
[Option ID = 21853]
2. 1.1?10
-2
[Option ID = 21855]
48)
49)
50)
3. 3.3?10
-3
[Option ID = 21854]
4. 6.5?10
-3
[Option ID = 21856]
5.6?10
-3
[Option ID = 21853]
An uncharged spin-half particle of mass m is confined to move on a circular wire of radius a . The particle has magnetic
moment ? . A magnetic field B is applied perpendicular to the plane of the wire. Then the energy eigenvalues of the particle
are (here n is an integer) [Question ID = 12953]
1. [Option ID = 21809]
2. [Option ID = 21812]
3. [Option ID = 21811]
4. [Option ID = 21810]
[Option ID = 21809]
A photon of initial wavelength 0.4 ? suffers two successive collision with two electrons. The deflection in the first
collision is 90? and in the second collision is 60?. The final wavelength of the photon is: [Question ID = 12966]
1. 0.024 ? [Option ID = 21861]
2. 0.436 ? [Option ID = 21862]
3. 0.4 ? [Option ID = 21864]
4. 0.012 ? [Option ID = 21863]