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Exam Date: 07-Oct-2020
Exam Time: 15:00-18:00
Examination: 1. Course Code - M. Tech.;M.P.H.;P.G.
Diploma in Bigdata
2. Field of Study - Nanoscience (NNST)
SECTION 1 - Nano Science NNST
Question No.1 (Question Id - 3)
Identify the incorrect option about the wave function :
(A)
Continuous
(B)
Infinite (Correct Answer)
(C)
Quantized
(D)
Finite
Question No.2 (Question Id - 6)
(A)
Br2/NaCl
(B)
Br2/NaOH (Correct Answer)
(C)
I2/NaCl
(D)
I2/NaOH
Question No.3 (Question Id - 29)
Ability to eat away pathogen is feature of :
(A)
Red blood cell
(B)
White blood cell (Correct Answer)
(C)
Liver
(D)
Plasma
Question No.4 (Question Id - 41)
Aceton in vapor phase is decomposed by light having a wavelength 320 nm yield products is :
(A)
CO2 + CH4
(B)
CO + CH3 (Correct Answer)
(C)
C + CH4
(D)
CO + CH4
Question No.5 (Question Id - 65)
Which among the following is correct about Viruses ?
(A)
They have DNA only
(B)
They have RNA only
(C)
They have both DNA & RNA
(D)
They have either DNA or RNA (Correct Answer)
Question No.6 (Question Id - 11)
When the separation between two charges is increased, the electric potential energy of the charges :
(A)
decreases
(B)
increases
(C)
remains the same
(D)
may increase or decrease (Correct Answer)
Question No.7 (Question Id - 38)
(A)
A = 0, B = 1.5
(B)
A = 1, B = 0 (Correct Answer)
(C)
A = 2, B = 1
(D)
A = 1, B = 1
Question No.8 (Question Id - 16)
Resistance of a material in superconducting state becomes :
(A)
finite
(B)
zero (Correct Answer)
(C)
infinite
(D)
arbitrary
Question No.9 (Question Id - 30)
The smallest unit of inheritance is called :
(A)
gene (Correct Answer)
(B)
allele
(C)
chromosome
(D)
RNA
Question No.10 (Question Id - 48)
A point charge 1 is a distance 5 cm directly above the centre of square of side 10 cm. What is the magnitude
of the electric flux through the square. (0 = permittivity of free space).
(A)
q/25
(B)
q/0
(C)
q/(5 0)
(D)
q/(6 0) (Correct Answer)
Question No.11 (Question Id - 58)
What is the composition of nucleoside ?
(A)
a sugar + a phosphate
(B)
a base + a sugar (Correct Answer)
(C)
a base + a phosphate
(D)
a base + a sugar + phosphate
Question No.12 (Question Id - 26)
Name the cells which lost their control of the regulated division, differentiation and apoptosis.
(A)
Tumor cell (Correct Answer)
(B)
Immune cell
(C)
Platelets
(D)
Stem cells
Question No.13 (Question Id - 39)
Identify the intermediate in Reimer-Tiemann reaction :
(A)
(Correct Answer)
(B)
(C)
(D)
Question No.14 (Question Id - 56)
Thalassemia is :
(A)
autosome linked recessive blood disease (Correct Answer)
(B)
inherited metabolism disease
(C)
sex-linked recessive disease due to defect in red cone of eye
(D)
none of these
Question No.15 (Question Id - 46)
X-rays of wavelength = a are reflected from the (100) plane of a simple cubic lattice. If the lattice constant
is a, the corresponding Bragg angle (in radian) is :
(A)
/4
(B)
/3
(C)
/5
(D)
/6 (Correct Answer)
Question No.16 (Question Id - 59)
Which of the following antibody gives a primary immune reaction ?
(A)
IgG
(B)
IgM (Correct Answer)
(C)
IgA
(D)
IgE
Question No.17 (Question Id - 20)
Following phenomenon can be explained only by particle nature of light :
(A)
Reflection
(B)
Refraction
(C)
Interference
(D)
Compton scattering (Correct Answer)
Question No.18 (Question Id - 28)
What is true about genetic material of a prokaryotic cell ?
(A)
lacks histones
(B)
not enveloped by nuclear membrane
(C)
composed of a single circular DNA molecule
(D)
all of these (Correct Answer)
Question No.19 (Question Id - 1)
Laplacian operator is :
(A)
/x2 + /y2 + /z2
(B)
2/xy + 2/yz + 2/xz
(C)
2/x2 + 2/y2 + 2/z2 (Correct Answer)
(D)
2/x + 2/y + 2/z
Question No.20 (Question Id - 5)
(A)
Birch Reaction (Correct Answer)
(B)
Cannizzaro Reaction
(C)
Bouveault Reduction
(D)
Clemmensen Reduction
Question No.21 (Question Id - 9)
All of the following is true statements concerning catalysts except :
(A)
A catalyst will speed the rate-determining step
(B)
A catalyst will be used up in a reaction (Correct Answer)
(C)
A catalyst may induce steric strain in a molecule to make it react more readily
(D)
A catalyst will lower the activation energy of a reaction
Question No.22 (Question Id - 15)
In the superconducting state, the material becomes :
(A)
ferromagnetic
(B)
perfect diamagnetic (Correct Answer)
(C)
ferrimagnetic
(D)
strong paramagnetic
Question No.23 (Question Id - 21)
Non-clotting of blood is caused by deficiency of :
(A)
Vitamin A
(B)
Vitamin C
(C)
Vitamin E
(D)
Vitamin K (Correct Answer)
Question No.24 (Question Id - 53)
(A)
A -I, B - IV, C - III, D - II
(B)
A - III, B - IV, C - II, D - I
(C)
A - I, B - II, C - III, D - IV
(D)
A - III, B - II, C - IV, D - I (Correct Answer)
Question No.25 (Question Id - 63)
Bacteria which have ability to convert milk sugar in to lactic acid is called :
(A)
Lactobacillus (Correct Answer)
(B)
Streptococcus
(C)
E. coli
(D)
Salmonella
Question No.26 (Question Id - 27)
Name the enzyme which catalyzes the oxidation-reduction reaction.
(A)
Transaminase
(B)
Glutamine synthetase
(C)
Phosphofructokinase
(D)
Oxidoreductase (Correct Answer)
Question No.27 (Question Id - 24)
Which ratio is constant for DNA ?
(A)
A + G/T + C (Correct Answer)
(B)
A + T/G + C
(C)
A + C/U + G
(D)
A + U/G + C
Question No.28 (Question Id - 32)
For the oxidation of iron
4Fe(s) + 3O2(g) 2Fe2O3(s)
Entropy change is - 549.4 J K-1 mol-1 at 298 K. Total entropy change for this reaction is :
(rH = - 1648 x 103 J mol-1)
(A)
4.98 kJ K-1 mol-1 (Correct Answer)
(B)
5.53 kJ K-1 mol-1
(C)
6.07 kJ K-1 mol-1
(D)
5.23 kJ K-1 mol-1
Question No.29 (Question Id - 43)
Let P and E denote the linear momentum and energy of a photon. If the wavelength is decreased,
(A)
Both P and E increase (Correct Answer)
(B)
P increases and E decreases
(C)
P decreases and E increases
(D)
Both P and E decrease
Question No.30 (Question Id - 31)
(A)
(Correct Answer)
(B)
(C)
(D)
Question No.31 (Question Id - 17)
With increase in temperature, the orientation polarization in general :
(A)
increases
(B)
decreases (Correct Answer)
(C)
is constant
(D)
none of these
Question No.32 (Question Id - 44)
Width of one-dimensional infinite potential well is decreased by half, what is the effect on its energy levels.
(A)
Energy levels do not change
(B)
Energy of the levels is doubled
(C)
Energy of the levels is quadrupled (Correct Answer)
(D)
Energy of the levels is halved
Question No.33 (Question Id - 25)
Which of the following promotes hypoglycemia ?
(A)
Epinephrine
(B)
Insulin (Correct Answer)
(C)
Norepinephrine
(D)
Growth hormone
Question No.34 (Question Id - 33)
In tetrathionate ion (S
2-
4O6 ), the oxidation numbers of sulphurs is/are :
(A)
0, + 5 (Correct Answer)
(B)
2.5
(C)
+ 2, + 3
(D)
+ 3
Question No.35 (Question Id - 64)
Law of thermodynamics which states that energy can neither be created nor be destroyed is ___________.
(A)
The second law of thermodynamics
(B)
Third law of thermodynamics
(C)
First law of thermodynamics (Correct Answer)
(D)
Zero-order kinetics
Question No.36 (Question Id - 23)
Programmed cell death can be termed as :
(A)
Oxidative stress
(B)
Apoptosis (Correct Answer)
(C)
Cell division
(D)
Cell cycle
Question No.37 (Question Id - 50)
In the polarization vs field strength for a ferroelectric material, Ps stands for :
(A)
Space charge polarization
(B)
Spontaneous polarization (Correct Answer)
(C)
Saturation polarization
(D)
None of these
Question No.38 (Question Id - 54)
If the sequence of bases in one strand of DNA is ATGCATGCA, what would be the sequence of bases on
complementary strand ?
(A)
ATGCATGCA
(B)
AUGCAUGCA
(C)
TACGTACGT (Correct Answer)
(D)
UACGUACGU
Question No.39 (Question Id - 13)
The temperature of antiferromagnetic to paramagnetic transition is called :
(A)
Antiferromagnetic Curie temperature
(B)
Curie-Weiss temperature
(C)
Neel temperature (Correct Answer)
(D)
Debye temperature
Question No.40 (Question Id - 2)
Which of the following molecule is trigonal pyramid shape ?
(A)
H2O
(B)
CO2
(C)
NH3 (Correct Answer)
(D)
BF3
Question No.41 (Question Id - 19)
If heat is supplied to an ideal gas in an isothermal process,
(A)
the internal energy of the gas will decrease
(B)
the gas will do positive work (Correct Answer)
(C)
the gas will do negative work
(D)
the said process is not possible
Question No.42 (Question Id - 34)
The molar solubility of Ni(OH)2 in 0.1 M NaOH is (ionic product of Ni(OH)2 = 2.0 x 10-15) :
(A)
1.0 x 10-12 M
(B)
2.0 x 10-13 M (Correct Answer)
(C)
5.0 x 10-12 M
(D)
4.0 x 10-13 M
Question No.43 (Question Id - 37)
Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R :
Assertion A:
Redox couple is the combination of oxidized and reduced form of a substance involved in an oxidation or
reduction half cell.
Reason R:
In the representation E(Fe3+ /Fe2+) and E (Cu2+/Cu), (Fe3+/Fe2+) and (Cu2+/Cu) are redox couple.
In the light of the above statements, choose the most appropriate answer from the options given below :
(A)
Both A and R are correct and R is the correct explanation of A
(B)
Both A and R are correct but R is NOT the correct explanation of A (Correct Answer)
(C)
A is correct but R is not correct
(D)
A is not correct but R is correct
Question No.44 (Question Id - 55)
Inner membrane of which organelle forms infolding called cristae ?
(A)
ribosomes
(B)
mitochondria (Correct Answer)
(C)
golgi apparatus
(D)
cell wall
Question No.45 (Question Id - 8)
Identify the oxide of alkaline earth metal which is essentially covalent in nature :
(A)
BeO (Correct Answer)
(B)
MgO
(C)
CaO
(D)
SrO
Question No.46 (Question Id - 14)
Acceptor type impurity in Si is formed by adding impurity of valency :
(A)
3 (Correct Answer)
(B)
4
(C)
5
(D)
6
Question No.47 (Question Id - 40)
(A)
(B)
(C)
(Correct Answer)
(D)
Question No.48 (Question Id - 42)
When a photon stimulates the emission of another photon, the two photons have :
A. Same direction
B. Same energy
C. Same phase
D. Same wavelength
Choose the correct answer from the options given below :
(A)
A and C Only
(B)
D and A Only
(C)
C and B Only
(D)
A, B, C and D (Correct Answer)
Question No.49 (Question Id - 52)
The internal energy of an ideal gas decreases by the same amount as the work done by the system.
A. The process must be adiabatic
B. The process must be isothermal
C. The process must be isobaric
D. The temperature must decrease
Choose the correct answer from the options given below :
(A)
A Only
(B)
B Only
(C)
C Only
(D)
A and D Only (Correct Answer)
Question No.50 (Question Id - 22)
Vaccine against tuberculosis is called :
(A)
Mycobacterium
(B)
Bacille Calmette Guerin (BCG) (Correct Answer)
(C)
S. typhi
(D)
Francisellatularensis
Question No.51 (Question Id - 35)
pH of a solution of a strong acid is 5.0. The pH of the solution obtained after diluting the given solution a 100
times is :
(log 2 = 0.301)
(A)
6.699 (Correct Answer)
(B)
7.001
(C)
5.501
(D)
5.691
Question No.52 (Question Id - 45)
A plane cuts intercepts a, 3b and 2c along the crystallographic axes in a crystal. The Miller indices of plane :
(A)
(623) (Correct Answer)
(B)
(263)
(C)
(362)
(D)
None of these
Question No.53 (Question Id - 47)
(A)
1/3 (Correct Answer)
(B)
1/3
(C)
1
(D)
0
Question No.54 (Question Id - 4)
Which of the reaction is not a part of Sandmeyer reaction ?
(A)
(B)
(C)
(Correct Answer)
(D)
Question No.55 (Question Id - 61)
(A)
A - I, B - III, C - IV, D - II
(B)
A - II, B - I, C - III, D - IV
(C)
A - I, B - IV, C - II, D - III (Correct Answer)
(D)
A - III, B - IV, C - II, D - I
Question No.56 (Question Id - 7)
For one component system, the phase rule is :
(A)
F = 3 - p (Correct Answer)
(B)
F = 2 - p
(C)
F = 1 - p
(D)
F = 1
Question No.57 (Question Id - 10)
With the rise in temperature the conductance of a solution of an electrolyte generally :
(A)
Decreases
(B)
Increases (Correct Answer)
(C)
Remain constant
(D)
A small decrease
Question No.58 (Question Id - 18)
Let np and ne be the number of holes and conduction electrons in an intrinsic semiconductor.
(A)
np > ne
(B)
np = ne (Correct Answer)
(C)
np < ne
(D)
np ne
Question No.59 (Question Id - 36)
Molar enthalpy change for vapourisation of 1 mol of water at 1 bar and 373 K is 41 kJ mol-1. The internal
energy change when 1 mol of water is vapourised is (if water vapour is assumed to be a perfect gas) :
(A)
41 kJ mol-1
(B)
37.9 kJ mol-1 (Correct Answer)
(C)
- 41 kJ mol-1
(D)
40.9 kJ mol-1
Question No.60 (Question Id - 57)
The most common stains used in Gram staining is :
(A)
crystal violet and methylene blue
(B)
crystal violet and safranin (Correct Answer)
(C)
crystal violet and carbol fuschin
(D)
safranin and methylene blue
Question No.61 (Question Id - 51)
In an extrinsic semiconductor, in the region where mobility variation with temperature is evident, the slope of
log (conductivity) vs. 1/T plot is :
(A)
negative
(B)
positive (Correct Answer)
(C)
0
(D)
infinite
Question No.62 (Question Id - 60)
Polio can lead to :
(A)
paralysis
(B)
nervous system distracted
(C)
both 1 and 2 (Correct Answer)
(D)
eye diseases
Question No.63 (Question Id - 62)
Mode of DNA replication is :
(A)
Conservative and bidirectional
(B)
Semiconservative and unidirectional
(C)
Semiconservative and bidirectional (Correct Answer)
(D)
Conservative and unidirectional
Question No.64 (Question Id - 49)
Magnetic field at a distance r from a long thin straight wire carrying current I is (0 is susceptibility, 0 is
permittivity of free space)
(A)
I/(40r2)
(B)
I.r/0
(C)
I2/(40r)
(D)
0I/(2r) (Correct Answer)
Question No.65 (Question Id - 12)
When dielectric slab of dielectric constant K is inserted fully between plates of a capacitor, its capacitance :
(A)
increases by a factor of K (Correct Answer)
(B)
decreases by a factor of K
(C)
remains constant
(D)
none of these
SECTION 2 - Nano Electronics
Question No.1 (Question Id - 70)
An 8-bits flash ADC is to be built. What is the minimum number of comparators required to build this circuit :
(A)
8
(B)
63
(C)
255 (Correct Answer)
(D)
256
Question No.2 (Question Id - 123)
(A)
010
(B)
111
(C)
100 (Correct Answer)
(D)
101
Question No.3 (Question Id - 75)
In Intel 8085 microprocessor,
(A)
the total addressable memory size is 512 KB
(B)
the total addressable memory size is 256 KB
(C)
the total addressable memory size is 128 KB
(D)
the total addressable memory size is 64 KB (Correct Answer)
Question No.4 (Question Id - 82)
In a semiconductor diode, the barrier potential offers opposition to only :
(A)
majority carriers in both regions (Correct Answer)
(B)
minority carriers in both regions
(C)
free electrons in the N region
(D)
holes in the P region
Question No.5 (Question Id - 69)
The base-to-emitter voltage (VBE) is 0.7 V and the collector-to-base voltage (VCB) is 0.2 V is given for a
silicon n-p-n transistor, then the transistor is operating in :
(A)
normal active mode (Correct Answer)
(B)
saturation mode
(C)
inverse active mode
(D)
cutoff mode
Question No.6 (Question Id - 86)
The current ICBO flows in :
(A)
the emitter, base and collector leads
(B)
the emitter and base leads
(C)
the emitter and collector leads
(D)
the collector and base leads (Correct Answer)
Question No.7 (Question Id - 102)
Consider the following statements S1 and S2 :
Statement I:
S1 : At the resonant frequency the impedance of a series RLC circuit is zero.
Statement II:
S2 : In a parallel GLC circuit, increasing the conductance G results in increase in its Q factor.
In the light of the above statements, choose the most appropriate answer from the options given below :
(A)
Both Statement I and Statement II are true
(B)
Both Statement I and Statement II are false (Correct Answer)
(C)
Statement I is correct but Statement II is false
(D)
Statement I is incorrect but Statement II is true
Question No.8 (Question Id - 118)
(A)
23.7 mA (Correct Answer)
(B)
14.2 mA
(C)
13.7 mA
(D)
24.2 mA
Question No.9 (Question Id - 117)
A Silicon PN junction diode under reverse bias has depletion region of width 10 m. The relative permittivity
of Silicon, r = 11.7 and the permittivity of free space o = 8.85 x 10-12 Fm. The depletion capacitance of the
diode per square meter is :
(A)
100.3 F
(B)
10.35 F (Correct Answer)
(C)
1.5 F
(D)
20 F
Question No.10 (Question Id - 116)
(A)
1.238 V
(B)
1.138 V
(C)
- 0.238 V (Correct Answer)
(D)
1.28 V
Question No.11 (Question Id - 110)
A master - slave flip flop has the characteristic that :
(A)
change in the output immediately reflected in the output
(B)
change in the output occurs when the state of the master is affected
(C)
change in the output occurs when the state of the slave is affected (Correct Answer)
(D)
both the master and the slave states are affected at the same time
Question No.12 (Question Id - 101)
A 4 bit ripple counter and a bit synchronous counter are made using flip flops having a propagation delay of
10 ns each. If the worst case delay in the ripple counter and the synchronous counter be R and S
respectively, then :
(A)
R = 10 ns, S = 40 ns
(B)
R = 40 ns, S = 10 ns (Correct Answer)
(C)
R = 10 ns, S = 30 ns
(D)
R = 30 ns, S = 10 ns
Question No.13 (Question Id - 121)
(A)
(Correct Answer)
(B)
(C)
(D)
Question No.14 (Question Id - 120)
In a p-type Si sample, the hole concentration is 2.25 x 1015/cm3. The intrinsic carrier concentration is 1.5 x
1010/cm3 . The electron concentration is :
(A)
zero
(B)
1010/cm3
(C)
105/cm3 (Correct Answer)
(D)
1.5 x 1025/cm3
Question No.15 (Question Id - 78)
A single "bus" structure is primarily found in :
(A)
main frame
(B)
super computers
(C)
high performance machine (Correct Answer)
(D)
mini and micro computers
Question No.16 (Question Id - 97)
(A)
A - I, B - II, C - IV, D - III
(B)
A - II, B - III, C - I, D - IV
(C)
A - III, B - IV, C - I, D - II (Correct Answer)
(D)
A - II, B - I, C - IV, D - III
Question No.17 (Question Id - 89)
Calculate the gain of a negative feedback amplifier with an internal gain, A=100 and feedback factor =
1/10.
(A)
0.909
(B)
1.09
(C)
9.09 (Correct Answer)
(D)
0.99
Question No.18 (Question Id - 109)
(A)
A - III, B - II, C - I
(B)
A - III, B - I, C - II (Correct Answer)
(C)
A - II, B - I, C - III
(D)
A - I, B - II, C - III
Question No.19 (Question Id - 106)
A series circuit R-L-C circuit has a Q of 100 and an impedance of (100 + j0) at its resonant angular
frequency of 107 radian/sec. The value of R and L are respectively as :
(A)
R = 100 , L = 5 mH
(B)
R = 50 , L = 5 mH
(C)
R = 100 , L = 1 mH (Correct Answer)
(D)
R = 100 , L = 15 mH
Question No.20 (Question Id - 105)
(A)
8.24 12.5
(B)
16.48 25.9 (Correct Answer)
(C)
6.48 5.9
(D)
32.48 25.9
Question No.21 (Question Id - 112)
(A)
(Correct Answer)
(B)
(C)
(D)
Question No.22 (Question Id - 74)
What is a microprocessor ?
(A)
A manually controlled device
(B)
Can be either manually controlled or program controlled
(C)
A program-controlled device (Correct Answer)
(D)
None of these
Question No.23 (Question Id - 129)
(A)
A - III, B - I, C - IV, D - II
(B)
A - I, B - IV, C - III, D - II
(C)
A - III, B - IV, C - I, D - II (Correct Answer)
(D)
A - III, B -II , C - I, D - IV
Question No.24 (Question Id - 111)
The bandgap of Silicon at 300 K is :
(A)
1.3 eV
(B)
0.7 eV
(C)
1.1 eV (Correct Answer)
(D)
1.4 eV
Question No.25 (Question Id - 66)
n-type silicon is obtained by doping silicon with :
(A)
Germanium
(B)
Phosphorus (Correct Answer)
(C)
Aluminium
(D)
Boron
Question No.26 (Question Id - 124)
(A)
VR = -5 V (Correct Answer)
(B)
VR = +5 V
(C)
0 V VR < 5 V
(D)
-5 V VR < 0 V
Question No.27 (Question Id - 103)
An AM news broadcasting station uses a carrier signal of 1 MHz. If the speech signal has frequency
component upto 8 kHz, then what is the lowest frequency, highest frequency present in the AM signal ?
Also what is the bandwidth of the AM signal ?
(A)
0.9 MHz; 1.1 MHz; 32 kHz
(B)
1.91 MHz; 1.23 MHz; 16 kHz
(C)
0.992 MHz; 1.008 MHz; 16 kHz (Correct Answer)
(D)
0.992 MHz; 1.008 MHz; 32 kHz
Question No.28 (Question Id - 72)
(A)
Only D1
(B)
Only D2
(C)
Both D1 and D2 (Correct Answer)
(D)
None of D1 and D2
Question No.29 (Question Id - 128)
The DC current gain of a BJT is 50. Assuming that the emitter injection efficiency is 0.995, the base
transport factor is :
(A)
0.980
(B)
0.985 (Correct Answer)
(C)
0.990
(D)
0.995
Question No.30 (Question Id - 94)
Which one of the following is analog ?
(A)
PCM
(B)
PWM (Correct Answer)
(C)
differential PCM
(D)
delta modulation
Question No.31 (Question Id - 73)
Given that (203)5 = (125)R what is the value of radix "R" ?
(A)
16
(B)
10
(C)
8
(D)
6 (Correct Answer)
Question No.32 (Question Id - 83)
The capacitance of a reverse-biased PN-junction :
(A)
increases as the reverse bias is decreased. (Correct Answer)
(B)
increases as the reverse bias is increased.
(C)
depends mainly on the reverse saturation current
(D)
makes the PN junction more effective at high frequencies.
Question No.33 (Question Id - 98)
A particular green LED emits light of wavelength 5490 Angstron. The energy band-gap of the semiconductor
material used there is : (Plank's constant = 6.626 x 10-34 Js)
(A)
2.26 eV (Correct Answer)
(B)
1.98 eV
(C)
1.17 eV
(D)
0.74 eV
Question No.34 (Question Id - 68)
To make the following statement correct, choose proper substitutes for X and Y : Tunnel diode and
Avalanche photo diode are operated in X bias and Y bias respectively.
(A)
X : reverse, Y : reverse
(B)
X : reverse, Y : forward
(C)
X : forward, Y : reverse (Correct Answer)
(D)
X : forward, Y : forward
Question No.35 (Question Id - 87)
The transistor is said to be a quiescent state when ?
(A)
no signal is applied to the input (Correct Answer)
(B)
it is unbiased
(C)
no current are flowing
(D)
emitter-junction bias is just equal to collector-junction bias
Question No.36 (Question Id - 80)
What is the bandwidth between half power points for a circuit which resonates at 1MHz and has a Q of 100
? (A) 10 kHz (Correct Answer)
(B)
100 kHz
(C)
10 Hz
(D)
100 Hz
Question No.37 (Question Id - 81)
The circuit analysis with nodal method is based on :
(A)
KVL and Ohm's Law
(B)
KCL and Ohm's Law (Correct Answer)
(C)
KCL and KVL
(D)
KCL, KVL and Ohm's Law
Question No.38 (Question Id - 67)
R = 2 k, L = 1 H, and C = 1/400 F are present in a series RLC circuit. What is the resonant frequency ?
(A)
2 x 104 Hz
(B)
104 Hz
(C)
(1/) 104 Hz (Correct Answer)
(D)
2 x 104 Hz
Question No.39 (Question Id - 127)
(A)
4/3 V , 2
(B)
4 V , 2/3
(C)
4/3 V , 2/3
(D)
4 V , 2 (Correct Answer)
Question No.40 (Question Id - 84)
A Zener diode :
(A)
has a high forward-voltage rating
(B)
has a sharp breakdown at low reverse voltage (Correct Answer)
(C)
is useful as an amplifier
(D)
has a negative resistance
Question No.41 (Question Id - 92)
In the design of an analog circuit to avoid thermal run-away, the operating point of the BJT should be :
(A)
VCE = (?) VCC
(B)
VCE (?) VCC (Correct Answer)
(C)
VCE (?) VCC
(D)
VCE = (0.78) VCC
Question No.42 (Question Id - 93)
The Boolean function Y = AB + CD is to be realized using only 2-input NAND gates. What is the minimum
number of gates required to implement this function ?
(A)
2
(B)
3 (Correct Answer)
(C)
4
(D)
5
Question No.43 (Question Id - 100)
An ideal sawtooth voltages waveform of frequency of 500 Hz and amplitude 3 V is generated by charging a
capacitor of 2 F in every cycle. The charging requires :
(A)
Constant voltage source of 3 V for 1 ms
(B)
Constant voltage source of 3 V for 2 ms
(C)
Constant current source of 1 mA for 1 ms
(D)
Constant current source of 3 mA for 2 ms (Correct Answer)
Question No.44 (Question Id - 71)
Find the unit of x H.
(A)
Ampere
(B)
Ampere/meter2 (Correct Answer)
(C)
Ampere/meter
(D)
Ampere-meter
Question No.45 (Question Id - 90)
The current of bipolar transistor drops at higher frequencies because of :
(A)
Transistor capacitance (Correct Answer)
(B)
high current effect in base
(C)
parasitic inductance
(D)
the early effect
Question No.46 (Question Id - 107)
A 0 to 6 counter consists of 3 flip flops and a combination circuit of 2 input gate (s). The common circuit
consists of :
(A)
one AND gate
(B)
one OR gate
(C)
one AND gate and one OR gate
(D)
two AND gates (Correct Answer)
Question No.47 (Question Id - 108)
A microprocessor with a 16-bit address bus is used in a linear memory selection configuration (i.e. Address
bus lines are directly used as a chip select of memory chip) with 4 memory chips. The maximum
addressable memory space is :
(A)
64k (Correct Answer)
(B)
16k
(C)
8k
(D)
4k
Question No.48 (Question Id - 77)
Restart is a special type of CALL in which :
(A)
the address is programmed but not built into the hardware
(B)
the address is programmed and built into the hardware
(C)
the address is not programmed but built into the hardware (Correct Answer)
(D)
none of these
Question No.49 (Question Id - 76)
Once the information placed into a read-only memory, then :
(A)
it can be modified easily
(B)
it is continuously modified
(C)
it cannot be modified easily (Correct Answer)
(D)
none of these
Question No.50 (Question Id - 119)
In a uniformly doped BJT, assume that NE, NB and NC are the emitter, base and collector doping in
atoms/cm3, respectively. If the emitter injection efficiency of the BJT is close unity, which one of the
following condition is TRUE ?
(A)
NE = NB
(B)
NE >> NB (Correct Answer)
(C)
NE > NB
(D)
NE < NB
Question No.51 (Question Id - 99)
When the gate-to-source voltage (VGS) of a MOSFET with threshold voltage of 400 mV, working in
saturation is 900 mV, the drain current is observed to be 1 mA. Neglecting the channel width modulation
effect and assuming that the MOSFET is operating at saturation, the drain current for an applied VGS of
1400 mV is :
(A)
0.5 mA
(B)
2.0 mA
(C)
3.5 mA
(D)
4.0 mA (Correct Answer)
Question No.52 (Question Id - 91)
The ideal op-amp has the following characteristics :
(A)
Rin = 0, A = and Ro = 0
(B)
Rin = , A = and Ro = 0 (Correct Answer)
(C)
Rin = 0, A = 0 and Ro =
(D)
Rin = , A = 0 and Ro =
Question No.53 (Question Id - 125)
The majority carriers in an n-type semiconductor have an average drift velocity v in a direction perpendicular
to a uniform magnetic field B. The electric field E induced due to Hall effect acts in the direction :
(A)
v x B
(B)
B x v (Correct Answer)
(C)
along v
(D)
opposite to v
Question No.54 (Question Id - 126)
(A)
A - IV, B - II, C - I, D - III
(B)
A - III, B - IV, C - I, D - II (Correct Answer)
(C)
A - II, B - IV, C - I, D - III
(D)
A - I, B - III, C - II, D - IV
Question No.55 (Question Id - 114)
A multistage amplifier consists of three stages. The voltage gains of the stages are 30, 50 and 80. Calculate
the overall voltage gain in dB.
(A)
100.3 dB
(B)
100.9 dB
(C)
101.58 dB (Correct Answer)
(D)
160.0 dB
Question No.56 (Question Id - 95)
Class of amplifiers that operates with least distortion.
(A)
Class B
(B)
Class A (Correct Answer)
(C)
Class C
(D)
Class D
Question No.57 (Question Id - 130)
Thin gate oxide in a CMOS process in preferably grown using :
(A)
wet oxidation
(B)
dry oxidation (Correct Answer)
(C)
epitaxial oxidation
(D)
ion implantation
Question No.58 (Question Id - 88)
The operation of a JFET involves :
(A)
a flow of minority carriers
(B)
a flow of majority carriers (Correct Answer)
(C)
recombination
(D)
negative resistance
Question No.59 (Question Id - 85)
How (beta) of a transistor is related to (alpha) of the transistor :
(A)
(B)
(C)
(Correct Answer)
(D)
Question No.60 (Question Id - 104)
A broadcast radio transmitter radiates 10 kilowatts when the modulation percentage is 60. How much of this
is carrier power ?
(A)
10 kilowatts
(B)
8.47 kilowatts (Correct Answer)
(C)
4.47 kilowatts
(D)
7.57 kilowatts
Question No.61 (Question Id - 96)
Twelve 1 resistance are used as edges to form a cube. The resistance between two diagonally opposite
corners of the cube is :
(A)
6/5
(B)
1
(C)
5/6 (Correct Answer)
(D)
2/3
Question No.62 (Question Id - 122)
The present output Qn of an edge triggered JK flip-flop is logic 0. If J = 1, then Qn + 1 :
(A)
Cannot be determined
(B)
Will be logic 0
(C)
will be logic 1 (Correct Answer)
(D)
will race around
Question No.63 (Question Id - 113)
(A)
IC = 4.5 mA ; VCE = 6 V (Correct Answer)
(B)
IC = 1.5 mA ; VCE = 6.5 V
(C)
IC = 2.5 mA ; VCE = 6 V
(D)
IC= 3.5 mA ; VCE = 6.5 V
Question No.64 (Question Id - 79)
Decimal digits can be converted to binary format using :
(A)
decoder
(B)
encoder (Correct Answer)
(C)
MUX
(D)
DEMUX
Question No.65 (Question Id - 115)
(A)
5 V and 2
(B)
7.5 V and 2.5 (Correct Answer)
(C)
4 V and 2
(D)
3 V and 2.5
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This post was last modified on 21 January 2021