Question Paper Name : BTECH E 3rd Sep 2020 Shift 2
Subject Name : BTECH E
Creation Date : 2020-09-03 20:32:57
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Duration : 180
Total Marks : 300
Display Marks: Yes
Share Answer Key With Delivery Engine : Yes
Actual Answer Key : Yes
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BTECH
Group Number : 1
Group Id : 405036120
Group Maximum Duration : 0
Group Minimum Duration : 180
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Show Attended Group? : No
Edit Attended Group? : No
Break time : 0
Group Marks : 300
Is this Group for Examiner? : No
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Physics
Section Id : 405036400
Section Number : 1
Section type : Online
Mandatory or Optional : Mandatory
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Number of Questions : 25
Number of Questions to be attempted : 25
Section Marks : 100
Display Number Panel : Yes
Group All Questions : Yes
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Mark As Answered Required? : Yes
Sub-Section Number : 1
Sub-Section Id : 405036767
Question Shuffling Allowed : Yes
Question Number : Yes Is Question Mandatory : No Single Line Question Option : No Option Orientation : Vertical
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Correct Marks : 4 Wrong Marks : 1
Amount of solar energy received on the earth's surface per unit area per unit time is defined a solar constant. Dimension of solar constant is:
Options:
40503640011. ML2T-2
40503640012. M2L0T-1
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40503640013. ML0T-3
40503640014. MLT-2
Question Number : 1 Question Id : 40503611006 Question Type : MCQ Option Shuffling : Yes Display Question Number : Yes Is Question Mandatory : No Single Line Question Option : No Option Orientation : Vertical
Correct Marks : 4 Wrong Marks : 1
? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? :
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Options:
40503640011. ML2T-2
40503640012. M2L0T-1
40503640013. ML0T-3
40503640014. MLT-2
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Question Number : 2 Question Id : 40503611007 Question Type : MCQ Option Shuffling : Yes Display Question Number : Yes Is Question Mandatory : No Single Line Question Option : No Option Orientation : Vertical
Correct Marks : 4 Wrong Marks : 1
A particle is moving unidirectionally on a horizontal plane under the action of a constant power supplying energy source. The displacement (s) - time (t) graph that describes the motion of the particle is (graphs are drawn schematically and are not to scale) :
Options:
40503640015.
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40503640016.
40503640017.
40503640018.
Question Number : 2 Question Id : 40503611007 Question Type : MCQ Option Shuffling : Yes Display Question Number : Yes Is Question Mandatory : No Single Line Question Option : No Option Orientation : Vertical
Correct Marks : 4 Wrong Marks : 1
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? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? (s) - ? (t) ? ? ? (? ? ?) :
Options:
40503640015.
40503640016.
40503640017.
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40503640018.
Question Number : 3 Question Id : 40503611008 Question Type : MCQ Option Shuffling : Yes Display Question Number : Yes Is Question Mandatory : No Single Line Question Option : No Option Orientation : Vertical
Correct Marks : 4 Wrong Marks : 1
A block of mass 1.9 kg is at rest at the edge of a table, of height 1 m. A bullet of mass 0.1 kg collides with the block and sticks to it. If the velocity of the bullet is 20 m/s in the horizontal direction just before the collision then the kinetic energy just before the combined system strikes the floor, is [Take g= 10 m/s². Assume there is no rotational motion and loss of energy after the collision is negligable.]
Options:
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40503640019. 20 J
40503640020. 21 J
40503640021. 19 J
40503640022. 23 J
Question Number : 3 Question Id : 40503611008 Question Type : MCQ Option Shuffling : Yes Display Question Number : Yes Is Question Mandatory : No Single Line Question Option : No Option Orientation : Vertical
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Correct Marks : 4 Wrong Marks : 1
? 1.9 kg ? ? ? ? 1m ? ? ? ? ? ? ? ? ? 0.1 kg ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 20 m/s ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? : [g = 10 m/s² ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?]
Options:
40503640019. 20 J
40503640020. 21 J
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40503640021. 19 J
40503640022. 23 J
Question Number : 4 Question Id : 40503611009 Question Type : MCQ Option Shuffling : Yes Display Question Number : Yes Is Question Mandatory : No Single Line Question Option : No Option Orientation : Vertical
Correct Marks : 4 Wrong Marks : 1
A uniform rod of length 'l' is pivoted at one of its ends on a vertical shaft of negligible radius. When the shaft rotates at angular speed w the rod makes an angle 0 with it (see figure). To find 0 equate the rate of change of angular momentum (direction going into the paper) ml² w²sine cose about the centre of mass (CM) to the torque provided by the horizontal and vertical forces FH and Fy about the CM. The value of 0 is then such that:
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Options:
40503640023. cos0 = g / 2l?²
40503640024. cos0 = g / l?²
40503640025. cos0 = 3g / 2l?²
40503640026. cos0 = 2g / 3l?²
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Question Number : 4 Question Id : 40503611009 Question Type : MCQ Option Shuffling : Yes Display Question Number : Yes Is Question Mandatory : No Single Line Question Option : No Option Orientation : Vertical
Correct Marks : 4 Wrong Marks : 1
? 'I' ? ? ? ? ? ? ? ? ? ? ? ? (pivoted) ? ? ? ? ? ? ? ? ? ? ? ? • ? ? ? (? ?)? ? ? ? ? ? ? ? ? ? ? ? (CM) ? ? ? ? ? ? ? ? ? (? ? w² sine cose ? ? ? ? ? ? ? ? ? ? ?) ? ? ? ? ? ? FH ? ? Fv ? ? CM ? ? ? ? ? ? ? ? ? ? ? ? ? :
Options:
40503640023. cos0 = g / 2l?²
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40503640024. cos0 = g / l?²
40503640025. cos0 = 3g / 2l?²
40503640026. cos0 = 2g / 3l?²
Question Number : 5 Question Id : 40503611010 Question Type : MCQ Option Shuffling : Yes Display Question Number : Yes Is Question Mandatory : No Single Line Question Option : No Option Orientation : Vertical
Correct Marks : 4 Wrong Marks : 1
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The mass density of a planet of radius R varies with the distance r from its centre as p(r) = Po (1 - r²/R²). Then the gravitational field is maximum at:
Options:
40503640027. r=R
40503640028. r= v(5/9) R
40503640029. r= v(3/4) R
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40503640030. r = (1/v3) R
Question Number : 5 Question Id : 40503611010 Question Type : MCQ Option Shuffling : Yes Display Question Number : Yes Is Question Mandatory : No Single Line Question Option : No Option Orientation : Vertical
Correct Marks : 4 Wrong Marks : 1
? R ? ? ? ? ? ? ? p(r) = Po (1 - r²/R²) ? ? ? ? ? ? r ? ? ? ? ? ? r ? ? ? ? ? ? ?
Options:
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40503640027. r=R
40503640028. r= v(5/9) R
40503640029. r= v(3/4) R
40503640030. r = (1/v3) R
Question Number : 6 Question Id : 40503611011 Question Type : MCQ Option Shuffling : Yes Display Question Number : Yes Is Question Mandatory : No Single Line Question Option : No Option Orientation : Vertical
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Correct Marks : 4 Wrong Marks : 1
A metallic sphere cools from 50°C to 40°C in 300 s. If atmospheric temperature around is 20°C, then the sphere's temperature after the next 5 minutes will be close to :
Options:
40503640031. 28°C
40503640032. 31°C
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40503640033. 33°C
40503640034. 35°C
Question Number : 6 Question Id : 40503611011 Question Type : MCQ Option Shuffling : Yes Display Question Number : Yes Is Question Mandatory : No Single Line Question Option : No Option Orientation : Vertical
Correct Marks : 4 Wrong Marks : 1
? ? ? ? ? ? 300s ? 50°C ? 40°C ? ? ? ? ? ? ? ?-? ? ? ? ? 20°C ? ? 5 ? ? ? ? ? ? ? ? ? ? ? ? ? ?
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Options:
40503640031. 28°C
40503640032. 31°C
40503640033. 33°C
40503640034. 35°C
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Question Number : 7 Question Id : 40503611012 Question Type : MCQ Option Shuffling : Yes Display Question Number : Yes Is Question Mandatory : No Single Line Question Option : No Option Orientation : Vertical
Correct Marks : 4 Wrong Marks : 1
A calorimeter of water equivalent 20 g contains 180 g of water at 25°C. 'm' grams of steam at 100°C is mixed in it till the temperature of the mixure is 31°C. The value of 'm' is close to (Latent heat of water=540 cal g-1, specific heat of water=1 cal g-1 °C-1)
Options:
40503640035. 2
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40503640036. 2.6
40503640037. 3.2
40503640038. 4
Question Number : 7 Question Id : 40503611012 Question Type : MCQ Option Shuffling : Yes Display Question Number : Yes Is Question Mandatory : No Single Line Question Option : No Option Orientation : Vertical
Correct Marks : 4 Wrong Marks : 1
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? ? (? ? 20 g) ? 25°C ? 180 g ? ? ? ? ? 100°C ? ? 'm' ? ? ? ? ? ? ? ? ? 31°C ? ? ? m ? ? ? ? (? ? ? ? = 540 cal g-1, ? ? ? ? = 1 cal g-1 °C-1)
Options:
40503640035. 2
40503640036. 2.6
40503640037. 3.2
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40503640038. 4
Question Number : 8 Question Id : 40503611013 Question Type : MCQ Option Shuffling : Yes Display Question Number : Yes Is Question Mandatory : No Single Line Question Option : No Option Orientation : Vertical
Correct Marks : 4 Wrong Marks : 1
To raise the temperature of a certain mass of gas by 50°C at a constant pressure, 160 calories of heat is required. When the same mass of gas is cooled by 100°C at constant volume, 240 calories of heat is released. How many degrees of freedom does each molecule of this gas have (assume gas to be ideal) ?
Options:
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40503640039. 3
40503640040. 5
40503640041. 6
40503640042. 7
Question Number : 8 Question Id : 40503611013 Question Type : MCQ Option Shuffling : Yes Display Question Number : Yes Is Question Mandatory : No Single Line Question Option : No Option Orientation : Vertical
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Correct Marks : 4 Wrong Marks : 1
? ? ? ? ? ? ? ? ? ? ? ? 50°C ? ? ? ? 160 ? ? ? ? ? ? ? ? ? ? ? ? ? 100°C ? ? ? ? ? ? ? ? ? ? ? 240 ? ? ? ? ? ? ? ? ? ? ? ? (degrees of freedom) ? ? ?: (? ? ? ? ? ?)
Options:
40503640039. 3
40503640040. 5
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40503640041. 6
40503640042. 7
Question Number : 9 Question Id : 40503611014 Question Type : MCQ Option Shuffling : Yes Display Question Number : Yes Is Question Mandatory : No Single Line Question Option : No Option Orientation : Vertical
Correct Marks : 4 Wrong Marks : 1
A block of mass m attached to a massless spring is performing oscillatory motion of amplitude 'A' on a frictionless horizontal plane. If half of the mass of the block breaks off when it is passing through its equilibrium point, the amplitude of oscillation for the remaining system become fA. The value of f is :
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Options:
40503640043. v2
40503640044. 1/v2
40503640045. 1
40503640046. 1/2
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Question Number : 9 Question Id : 40503611014 Question Type : MCQ Option Shuffling : Yes Display Question Number : Yes Is Question Mandatory : No Single Line Question Option : No Option Orientation : Vertical
Correct Marks : 4 Wrong Marks : 1
? m ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? A ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? fA ? ? ? f ? ? ? :
Options:
40503640043. v2
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40503640044. 1/v2
40503640045. 1
40503640046. 1/2
Question Number : 10 Question Id : 40503611015 Question Type : MCQ Option Shuffling : Yes Display Question Number : Yes Is Question Mandatory : No Single Line Question Option : No Option Orientation : Vertical
Correct Marks : 4 Wrong Marks : 1
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Hydrogen ion and singly ionized helium atom are accelerated, from rest, through the same potential difference. The ratio of final speeds of hydrogen and helium ions is close to:
Options:
40503640047. 5:7
40503640048. 10:7
40503640049. 1:2
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40503640050. 2:1
Question Number : 10 Question Id : 40503611015 Question Type : MCQ Option Shuffling : Yes Display Question Number : Yes Is Question Mandatory : No Single Line Question Option : No Option Orientation : Vertical
Correct Marks : 4 Wrong Marks : 1
? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
Options:
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40503640047. 5:7
40503640048. 10:7
40503640049. 1:2
40503640050. 2:1
Question Number : 11 Question Id : 40503611016 Question Type : MCQ Option Shuffling : Yes Display Question Number : Yes Is Question Mandatory : No Single Line Question Option : No Option Orientation : Vertical
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Correct Marks : 4 Wrong Marks : 1
Concentric metallic hollow spheres of radii R and 4R hold charges Q1 and Q2 respectively. Given that surface charge densities of the concentric spheres are equal, the potential difference V(R) - V(4R) is:
Options:
40503640051. 3Q1 / 4pe0R
40503640052. 3Q1 / 16pe0R
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40503640053. 3Q2 / 4pe0R
40503640054. Q2 / 4pe0R
Question Number : 11 Question Id : 40503611016 Question Type : MCQ Option Shuffling : Yes Display Question Number : Yes Is Question Mandatory : No Single Line Question Option : No Option Orientation : Vertical
Correct Marks : 4 Wrong Marks : 1
? ? ? ? ? ? ? ? ? ? R ? 4R ? ? ? ? ? Q1 ? Q2 ? ? ? ? ? ? ? ? ? (surface charge density) ? ? ? ? V(R) - V(4R) ? ? ? :
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Options:
40503640051. 3Q1 / 4pe0R
40503640052. 3Q1 / 16pe0R
40503640053. 3Q2 / 4pe0R
40503640054. Q2 / 4pe0R
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Question Number : 12 Question Id : 40503611017 Question Type : MCQ Option Shuffling : Yes Display Question Number : Yes Is Question Mandatory : No Single Line Question Option : No Option Orientation : Vertical
Correct Marks : 4 Wrong Marks : 1
Two resistors 400O and 800O are connected in series across a 6 V battery. The potential difference measured by a voltmeter of 10 kO across 400O resistor is close to :
Options:
40503640055. 2 V
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40503640056. 1.95 V
40503640057. 1.8 V
40503640058. 2.05 V
Question Number : 12 Question Id : 40503611017 Question Type : MCQ Option Shuffling : Yes Display Question Number : Yes Is Question Mandatory : No Single Line Question Option : No Option Orientation : Vertical
Correct Marks : 4 Wrong Marks : 1
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? ? ? ? 400O ? 800O ? ? ? ? ? ? 6V ? ? ? ? ? ? ? ? ? 10 kO ? ? ? ? ? 400O ? ? ? ? ? ? ? ? ? ? ? ? ? ?
Options:
40503640055. 2 V
40503640056. 1.95 V
40503640057. 1.8 V
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40503640058. 2.05 V
Question Number : 13 Question Id : 40503611018 Question Type : MCQ Option Shuffling : Yes Display Question Number : Yes Is Question Mandatory : No Single Line Question Option : No Option Orientation : Vertical
Correct Marks : 4 Wrong Marks : 1
A perfectly diamagnetic sphere has a small spherical cavity at its centre, which is filled with a paramagnetic substance. The whole system is placed in a uniform magnetic field B. Then the field inside the paramagnetic substance is :
Options:
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40503640059. much large than |B| and parallel to B
40503640060. much large than |B| but opposite to B
40503640061. zero
40503640062. B
Question Number : 13 Question Id : 40503611018 Question Type : MCQ Option Shuffling : Yes Display Question Number : Yes Is Question Mandatory : No Single Line Question Option : No Option Orientation : Vertical
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Correct Marks : 4 Wrong Marks : 1
? ? (diamagnetic) ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? (paramagnetic) ? ? ? ? ? ? ? ? ? ? ? ? ? B ? ? ? ? ? ? ? ? ? ? :
Options:
40503640059. |B| ? ? ? ? B ? ?
40503640060. |B| ? ? ? ? B ? ? ?
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40503640061. ?
40503640062. B
Question Number : 14 Question Id : 40503611019 Question Type : MCQ Option Shuffling : Yes Display Question Number : Yes Is Question Mandatory : No Single Line Question Option : No Option Orientation : Vertical
Correct Marks : 4 Wrong Marks : 1
A uniform magnetic field B exists in a direction perpendicular to the plane of a square loop made of a metal wire. The wire has a diameter of 4 mm and a total length of 30 cm. The magnetic field changes with time at a steady rate dB/dt=0.032 Ts-1. The induced current in the loop is close to (Resistivity of the metal wire is 1.23 × 10-8 Om)
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Options:
40503640063. 0.61 A
40503640064. 0.43 A
40503640065. 0.34 A
40503640066. 0.53 A
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Question Number : 14 Question Id : 40503611019 Question Type : MCQ Option Shuffling : Yes Display Question Number : Yes Is Question Mandatory : No Single Line Question Option : No Option Orientation : Vertical
Correct Marks : 4 Wrong Marks : 1
? ? ? ? ? ? ? ? ? ? ? ? ? ? ? B ? ? ? ? ? ? 4 mm ? ? ? ? ? 30 cm ? ? ? ? ? ? ? (dB/dt = 0.032 Ts-1) ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? : (? ? ? = 1.23×10-80m)
Options:
40503640063. 0.61 A
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40503640064. 0.43 A
40503640065. 0.34 A
Question Number : 15 Question Id : 40503611020 Question Type : MCQ Option Shuffling : Yes Display Question Number : Yes Is Question Mandatory : No Single Line Question Option : No Option Orientation : Vertical
Correct Marks : 4 Wrong Marks : 1
The electric field of a plane electromagnetic wave propagating along the x direction in vacuum is E = Eo j cos(wt - kx). The magnetic field B, at the moment t=0 is:
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Options:
40503640067. B = ?v(µ?e?) cos(kx) k
40503640068. B = Eo / v(µ?e?) cos(kx)k
40503640069. B = ? v(µ?e?) cos(kx) j
40503640070. B = Eo / v(µ?e?) cos(kx) j
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Question
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