2. SECTION – I
Straight Objective Type
This section contains multiple choice questions numbered 100 . Each question has 4 choices (A), (B), (C)
and (D), out of which ONLY ONE is correct.
3. 01 Problem
A sphere, a cube and a thin circular plate, all made of the same material and
having the same mass are initially heated to a temperature of 10000C. which
one of these will cool first?
a. Plate
b. Sphere
c. Cube
d. None of these
4. 02 Problem
A beam of light composed of red and green rays is incident obliquely at a
point on the face of a rectangular glass slab. When coming out on the
opposite parallel face, the red and green rays emerge from:
a. Two points propagating in two different non-parallel directions
b. Two points propagating in two different parallel directions
c. One point propagating in two different directions
d. One point propagating in the same directions
5. 03 Problem
Two wires having resistances of 2Ω and 4 Ω are connected to same voltage.
The ratio of heat dissipated in the resistances will be :
a. 4:3
b. 1:2
c. 5:2
d. 2:1
6. 04 Problem
a photon moves to energy level E1 from E2 find more stable nucleus, then the
frequency will be :
a. Exactly (E2-E1)/h
b. Slightly greater than (E2-E1)/h
c. Slightly less than (E2-E1)/h
d. Hv
7. 05 Problem
At 273oC, the emissive power of a perfect black body is R. what is its values at
0oC?
a. R/4
b. R/16
c. R/2
d. None of these
8. 06 Problem
Among two discs A and B, first have radius 10 cm charges 10-6C and second
have radius 30 cm and charges 10-5C. when they are touched, charges on both
are qA and qB respectively, will be :
a. qA=2.2.75μC, qB= 3.15 C
b. qA=1.09μC,qB=1.53 C
c. qA=qB=5.5μC
d. None of these
9. CV =
07 Problem
The potential difference between the cathode and the target electrode in a
Coolidge tube is 24.75kV. the minimum wavelength of the emitted X-rays is :
a. 0.1Å
b. 0.5 Å
c. 1 Å
d. 5Å
10. 08 Problem
The first named planetoid (ceres) has its orbit in between the orbits of:
a. Mars and jupiter
b. Neptune and Pluto
c. Mercury and Pluto
d. Venus and Saturn
11. 09 Problem
A torque of 10-5 Nm is required to hold a magnet at 90o with the horizontal
component of the hold it at 30o will be:
a. 5x10-6Nm
b. data is insufficient
c. 5 3x10 6
1
d. x10 5
3
12. 10 Problem
A 220 V, 100 W bulb is joined with a 110 V supply. The power consumed by the
bulb is :
a. 50W
b. 25W
c. 80W
d. 100W
13. 11 Problem
Newton’s corpuscular theory could not explain the phenomenon for:
a. Reflection
b. Refraction
c. Diffraction
d. Rectilinear propagation
14. 12 Problem
Which one of the following statements is correct?
a. Conduction is a fast process
b. Convection is a fast process
c. Radiation is a fast process
d. None of above
15. 13 Problem
A sample of an ideal gas occupies a volume Vat pressure P and absolute
temperature T. the mass of each molecule is m, then the density of the gas is :
a. MkT
pm
b.
kT
c. p
km
d. p
kT
16. 14 Problem
An air column in a pipe which is closed at one end, will be in resonance with the
vibration body of frequency 166 Hz, if the length of the air column is :
a. 0.5 m
b. 1.0 m
c. 1.5 m
d. 2.0 m
17. 15 Problem
A wave equation which gives the displacement along the direction is given by
Y=0.001 sin(100t + x)
When x and y are in metre and t I second
This equation represents a wave:
a. Traveling with a velocity of 100 m/s in the negative x-direction
b. Traveling with a velocity of m/s in the positive x-direction
c. Of wavelength 1 m
d. Of frequency 100/ Hz
18. 16 Problem
In order to initiate the surface loading limit, the sides of ships are marked by
the lines called:
a. Load lines
b. Plimosoll lines which has below those for fresh water
c. Safety lines
d. Danger (or limit) lines
19. 17 Problem
A container party filled in a liquid is suspended from a spring of shops balance.
A small body is gently dropped in the container in the container. The pointer of
spring balance will:
a. Read less
b. Oscillate
c. Read the same
d. read more
20. 18 Problem
Two particles, initially at rest move towards each other under the effect of
gravitational force of attraction. At the instant when their relative velocity is 3v
where v the velocity of the slower particle, then the speed of the speed of the
center of mass of two given particles is :
a. 1v
b. 2v
c. 3v
d. zero
21. 19 Problem
A body of mass 10 kg moves with a velocity v of 2 m/s along a circular path or
radius 8 m. The power produced by the body will be ;
a. 10 J/s
b. 98 J/s
c. 49 J/s
d. zero
22. 20 Problem
A ball of mass 0.5 kg is moving with a velocity v of 2 m/s. It is subjected to a
force of x Newton in 2 s. Because of this force, the ball moves with velocity of 3
m/s. The value of x is :
a. 5 N
b. 8.25 N
c. 0.25 N
d. 1.0 N
23. 21 Problem
A thin prism P1 with angle 40 and made from glass of refractive index 1.54 is
combined with another prism P2 made of glass of refractive index 1.72 to
produce dispersion without deviation. The angle of prism P2 is :
a. 5.330
b. 40
c. 2.60
d. 30
24. 22 Problem
In a reaction 92Be234 88Y
218, the number of -particles emitted respectively,
are :
a. 4, 4
b. 4, 6
c. 4, 8
d. 4, 2
25. 23 Problem
If thermo emf is given by E = at + bt2, then the neutral temperature is :
a. a
2b
b. 2b
a
a
c.
b
d. b
a
26. 24 Problem
In the following transitions, which one has higher frequency ?
a. 3 1
b. 4 2
c. 4 3
d. 3 2
27. 25 Problem
If increase in linear momentum of a body is 50%, then change in its kinetic
energy is :
a. 25%
b. 125%
c. 150%
d. 50%
28. 26 Problem
If two soap bubbles of different radii are in contact then :
a. Air rushes from smaller bubble to bigger bubble which continues to grow at
the cost of the smaller bubble
b. Sizes of the bubbles remain the same
c. Air rushes from bigger bubble to smaller bubble until the size of two
becomes same
d. None of these
29. 27 Problem
The current gain of a transistor in common-base mode is 0.995. Its current gain
in the common-emitter mode is :
a. 200
b. 90.5
c. 100
d. 1.005
30. 28 Problem
A photocell is illuminated by a small bright source placed 2m away. When the
same source of light is placed 4 m away, the electrons emitted by photo-
cathode in one second
a. Carry one quarter of their previous energy
b. Carry one quarter of their previous momentum
c. Are half numerous
d. Are one quarter numerous
31. 29 Problem
Two then long parallel wires separated by a distance b are carrying a current i
ampere each. The magnitude of the force per unit length exerted by one wire
on the other, is :
2
a. 0 i
2
b
i2
b. 0
2 b2
i
c. 0
2 b
d. 0i2
2 b
32. 30 Problem
A conducting wire of cross-sectional area 1 cm2 has 3 x 1023 charge carriers per
metre3. If wire carries a current 24 mA, then drift velocity of carriers is :
a. 5 x 10-2 m/s
b. 0.5 m/s
c. 5 x 10-3 m/s
d. 5 x 10-6 m/s
33. 31 Problem
The capacitance of a metallic sphere is 1μF, then its readius is nearly :
a. 1.11 m
b. 10 m
c. 9 km
d. 1.11 cm
34. 32 Problem
For a projectile (range)2 is 48 times of (maximum height)2 obtained. Find the
angle of projection.
a. 600
b. 300
c. 450
d. 750
35. 33 Problem
At room temperature, the rms speed of the molecules of certain diatomic gas
is found to be 1933 m/s. The gas is :
a. H2
b. F2
c. Cl2
d. O2
36. 34 Problem
The refractive index of a piece of transparent quartz is greatest for :
a. Violet light
b. Green light
c. Yellow light
d. Red light
37. 35 Problem
The equation of longitudinal wave is represented as y = 20 cos (50t - x) cm
Then its wavelength is :
a. 120 cm
b. 50 cm
c. 2 cm
d. 5 cm
38. 36 Problem
With the increase of temperature, the surface tension of the liquid :
a. may increase of decrease depending on the density of liquid
b. remains the same
c. always increases
d. always decreases
39. 37 Problem
A force of 6 x 106 Nm-2 is required for breaking a material. The density of the
material is 3 x 103 kg m-3. If the wire is to break under its own weight, the
length of the wire made of that material should be : (take g =10 ms-2)
a. 20 m
b. 200 m
c. 100 m
d. 2000 m
40. 38 Problem
The escape velocity of a rocket launched from the surface of the earth :
a. Depends on the mass of the rocket
b. Depends on the mass of the planet towards which, it is moving
c. Does not depend on the mass of earth
d. Does not depend on the mass of rocket
41. 39 Problem
A stone is released from a tower, its total energy during its fall :
a. Increases
b. Decreases
c. Remains constant
d. First increases then remains constant
42. 40 Problem
A ball falls from 20 m height on floor and rebounds to 5 m. Time of contact is
0.02 s. Find acceleration during impact :
a. 1200 m/s2
b. 1000 m/s2
c. 2000 m/s2
d. 1500 m/s2
43. 41 Problem
One metre long metal rod of silver at 00C is heated to 1000C. Its length is
increased by 0.19 cm. Coefficient of cubical expansion of the silver rod is :
a. 5.7 x 10-5/0C
b. 0.63 x 10-5/0C
c. 1.9 x 10-5/0C
d. 61.1 x 10-5/0C
44. 42 Problem
Two charges are at a distance d apart. If a copper plate of thickness d/2 is kept
between them, the effective force will be :
a. F/2
b. Zero
c. 2F
d. 2F
45. 43 Problem
Bragg’s law for X-rays is :
a. n sin 2 d
b. d sin n
c. 2 d sin n
46. 44 Problem
Two mirrors are placed at right angle to each other. A man is standing between
them combing his hair. How many images will he see ?
a. 2
b. 3
c. 1
d. zero
47. 45 Problem
We can obtain polarized light with the help of which of the following
instrument ?
a. Nicol prism
b. Biprism
c. Polarimeter
d. None of these
48. 46 Problem
15 g of ice melts to form water at 00C. What is the change in entropy ?
a. 18.5
b. 15
c. zero
d. None of these
49. 47 Problem
A piece of copper and another of germanium are cooled from room
temperature to 50 K. The resistance of :
a. Each of them decreases
b. Copper decreases and germanium increases
c. Each of them increases
d. Copper increases and germanium decreases
50. 48 Problem
The threshold wavelength for photoelectrons emission from a material is 5200
Å. Photoelectrons will be emitted when this material is illuminated with
monochromatic radiation from a :
a. 1 W infrared lamp
b. 1 W ultraviolet lamp
c. 500 W infrared lamp
d. 1000 W infrared lamp
51. 49 Problem
A small magnet kept in a non-uniform magnetic field experiences :
a. Neither a force nor a torque
b. A force and a torque
c. A torque but not a force
d. A force but not a torque
52. 50 Problem
In a room containing smoke particles, the intensity due to a source of light will
:
a. Obey the inverse square law
b. Be constant at all distances
c. Increase with distance from the source than the inverse fourth power law
d. Fall faster with distance from source than the inverse fourth power law
53. 51 Problem
When a ray of light enters a glass slab from air :
a. Its wavelength increases
b. Neither wavelength increases
c. Its wavelength decreases
d. Its frequency increases
54. 52 Problem
Saturated vapour is compressed to half its volume without any change in
temperature, then the pressure will be :
a. Doubled
b. Halved
c. The same
d. Zero
55. 53 Problem
The superficial expansively of a solid is , then the cubical expansivity is :
a. 2/3 β
b. 3/2 β
c. 2 β
d. 3 β
56. 54 Problem
When a star approaches the earth, then the spectral lines are shifted towards :
a. Red end
b. Blue end
c. Yellow colour
d. Green colour
57. 55 Problem
A particle is executing SHM at mid point of mean position and extremity. What
is the potential energy in terms of total energy (E) ?
a. E/4
b. E/16
c. E/2
d. E/8
58. 56 Problem
In simple harmonic motion, the ratio of acceleration of the particle to its
displacement at at any time is a measure of :
a. Spring constant
b. Angular frequency
c. (angular frequency)2
d. restoring force
59. 57 Problem
In case of steel wire or a metal wire, the elastic limit is reached when :
a. The wire just break
b. The load is more than the weight of wire
c. Elongation is inversely proportional to the tension
d. None of the above
60. 58 Problem
A hole is drilled through the earth along the diameter and a stone is dropped
into it. When the stone is at the centre of earth, it possesses :
a. Weight
b. Mass
c. Acceleration
d. Potential energy
61. 59 Problem
An eraser weighing 1 N is pressed against a vertical black board with a normal
force of 5 N. The coefficient of friction between eraser and black board is
approximately 0.4. The force along the black board required to move the easer
is :
a. 2 N
b. 0.4 N
c. 2.4 N
d. 9.8 N
62. 60 Problem
A ball of mass 0.12 kg is being whirled is an horizontal circle at the end of string
0.5 m long. It is capable of making 231 revolutions in one minute. The breaking
tension of the string is :
a. 3 N
b. 15.1 N
c. 31. 5 N
d. 35.1 N
63. 61 Problem
It is possible to hear beats from the two vibrating sources of frequencies :
a. 1000 Hz and 1500 Hz
b. 400 Hz and 500 Hz
c. 100 Hz and 150 Hz
d. 20 Hz and 25 Hz
64. 62 Problem
Force between two plates of a capacitor is :
q2
a.
2 0A
2
b. q
0 A
q
c.
0A
d. none of these
65. 63 Problem
A transistor can be used as an amplifier when :
a. Emitter is forward biased and collector is reverse biased
b. Both are reverse biased
c. Both emitter and collector are forward biased
d. None of the above
66. 64 Problem
A wire of length l and resistance R is stretched to get the radius of cross-section
r/2. Then the new value of R is :
a. 16 R
b. 4 R
c. 8 R
d. 5 R
67. 65 Problem
Calcium plate has maximum possible radiation of wavelength of 400 nm to
eject electrons. Its work function is :
a. 2.3 eV
b. 3.1 eV
c. 4.5 eV
d. none of these
68. 66 Problem
If one face of prism is silvered having prism angle 300 and 2 . What will be
the angle of incidence, so that the incident ray retraces its path ?
300
600
900
450
69. 67 Problem
Mass number of nucleus is :
a. Always less than is atomic number
b. Always more than its atomic number
c. Sometimes more than atomic number exceptionally equal to its atomic
number
d. Always equal to its atomic number
70. 68 Problem
A 1 µF capacitor is charged to 50 V potential difference and then discharged
through a 10 mH inductor of negligible resistance. The maximum current in the
inductor will be :
a. 0.5 A
b. 1.6 A
c. 0.16 A
d. 1.0 A
71. 69 Problem
A 100 W bulb working on 200 V has resistance R and a 200 W bulb working on
100 V has resistance S, then R/S is :
a. 1/8
b. 1/4
c. 8
d. 4
72. 70 Problem
Dimensions of capacitance is :
a. [M-1L-2T4A2]
b. [MLT-3A-1]
c. [ML2T-3A-1]
d. [M-1L-2T3A-1]
73. 71 Problem
In a mechanical refrigerator, the low temperature coils are at a temperature of
–230C and the compressed gas in the condenser has a temperature of 270C.
The theoretical coefficient of performance is :
a. 5
b. 8
c. 6
d. 5
74. 72 Problem
The thermal capacity of a body is 80 cal, then its water equivalent is :
a. 80 cal/g
b. 80 g
c. 800 g
d. 80 kg
75. 73 Problem
A brass disc fits simply in a hole of a steel plate. The disc from the hole can be
loosened, if the system :
a. First heated then cooled
b. First cooled then heated
c. Is heated
d. Is cooled
76. 4
74 Problem
Velocity of sound measured in hydrogen and oxygen gas at given temperature
will be in the ratio :
a. 1 : 1
b. 2 : 1
c. 1 : 4
d. 4 : 1
77. 4
75 Problem
The amount of the work done in blowing a bubble of radius r and surface
tension σ, is :
a. σ
b. 4 r 2
c. 8 r 2
d.6 r2
78. 76 Problem
A liquid X of density 3.36 g/cm3 is poured in a U-tube, which contains Hg.
Another liquid Y is poured in left arm with height 8 cm, upper levels of X and Y
are same. What is density of Y ?
a. 0.8 g/cc
b. 1.2 g/cc
c. 1.4 g/cc
d. 1.6 g/cc
79. 77 Problem
For a given material, the Young’s modulus is 2.4 times that of rigidity modulus,
then poisson’s ratio of :
a. 0.2
b. 0.4
c. 1.2
d. 2.4
80. 78 Problem
When a body is supposed to be falling under gravity, its acceleration depends
upon mass of :
a. Both the earth and the body
b. The body but independent of mass of earth
c. The earth
d. The body
81. 79 Problem
In BJT, maximum current flows in which of the following ?
a. Emitter region
b. Base region
c. Collector region
d. Equal in all regions
82. 80 Problem
A ball thrown vertically upwards with an initial velocity 1.4 ms-1 returns in 2 s.
The total displacement of the ball is :
a. 22.4 m
b. zero
c. 44.8 m
d. 33.6 m
83. 81 Problem
In double slit experiment, the angular which of the fringes is 0.200 for the
sodium light ( 5890Å). In order to increase the angular width of the fringes
=
by 10%, the necessary change in wavelength is :
a. Zero
b. Increased by 6479 Å
c. Decreased by 586 Å
d. Increased by 589 Å
84. 82 Problem
A convex lens has mean focal length of 20 cm. The dispersive power of the
material of the lens is 0.02. The longitudinal chromatic aberration for an object
at infinity is :
a. 103
b. 0.80
c. 0.40
d. 0.20
85. 83 Problem
1mg gold undergoes decay with 2.7 days half-life period, amount left after 8.1
days is :
a. 0.125 mg
b. 0.5 mg
c. 0.25 mg
d. 0.91 mg
86. 84 Problem
A planet have same density and same acceleration due to gravity as of earth
and universal gravitational constant G is twice of earth, the ratio of their radii is
:
a. 1 : 4
b. 1 : 5
c. 1 : 2
d. 3 : 2
87. 85 Problem
If refractive index of glass is 1.50 and of water is 1.33, then critical angle is :
8
a. sin 1
9
2
b. sin 1
3
1 8
c. cos
9
d. None of these
88. 86 Problem
If an object subtends an angle of 20 at eye when seen through telescope having
objective and eye-piece of focal length f0 = 60 cm and fe = 5 cm respectively,
then angle subtend at eye-piece is :
a. 100
b. 240
c. 500
d. 100
89. 87 Problem
The ionization potential of mercury is 10.39 V. How far an electron must travel
in an electric field of 1.5 x 106 V/m to gain sufficient energy to ionize mercury ?
a. 10.39
m
1.6 x 10 19
10.39
b. m
2 x 1.6 x 10 19
c. 10.39 x 1.6 x 10-19 m
10.39
d. m
1.5 x 106
90. 88 Problem
A straight wire conductor of length l of 0.4 m is moving with a speed v of 7 m/s
perpendicular to a magnetic field B of intensity 0.9 Wb/m2. The induced emf
across the conductor is :
a. 2.52 V
b. 25.2 V
c. 5.26 V
d. 1.26 V
91. 89 Problem
It takes 12 min to boil 1 L of water in an electric kettle. Due to some defect it
becomes necessary to remove 20% turns of the heating coil of the kettle. After
repair, how must time will it take to boil 1 L of water ?
a. 9.6 min
b. 14.4 min
c. 16.8 min
d. 18.2 min
92. 90 Problem
Electromagnetic radiation consists of photons which have the greatest energy
is :
a. radio waves
b. γ-rays
c. visible light
d. X-ray
93. 91 Problem
Sound waves from whistle of frequency 1100 Hz reaches a point by two
different paths. When the paths differ by 0.15 m and 0.45 m, there is a silence
at that point. The speed of sound is :
a. 1100 x 0.60 m/s
b. 1100 x 0.45 m/s
c. 1100 x 0.30 m/s
d. 1100 x 0.15 m/s
94. 92 Problem
The ratio of radiant energies radiated per unit surface area by two bodies is 16
: 1, the temperature of hotter body is 1000 K, then the temperature of colder
body will be :
a. 250 K
b. 500 K
c. 1000 K
d. 62.5 K
95. 93 Problem
A cylindrical tube closed at one end contains air. It produces the fundamental
note of frequency 512 Hz. If the tube is opened at both ends. The fundamental
frequency that can be excited is :
a. 256 Hz
b. 512 Hz
c. 1024 Hz
d. 128 Hz
96. 94 Problem
What is the ratio of most probable speed and average speed in a gas enclosed
in a vessel ?
2
a.
b.
2
c. 1
d.
4
97. 95 Problem
A block of steel of size 5 cm x 5 cm x 5 cm is weighed in water. If the relative
density of steel is 7, its apparent weight is :
a. 4 x 4 x 4 x 6 g
b. 5 x 5 x 5 x 9 g
c. 4 x 4 x 4 x 7 g
d. 6 x 5 x 5 x 5 g
98. 96 Problem
A coin is of mass 4.8 kg and radius 1 m rolling on a horizontal surface without
sliding with angular velocity 600 rot/min. What is total kinetic energy of the
coin ?
a. 360 J
b. 1440 π2 J
c. 4000 π 2 J
d. 600 π 2 J
99. 97 Problem
1 N/m is equal to :
a. 1 Jm-2
b. 1 Jm-3
c. 1 Jm2
d. none of these
100. 98 Problem
A force F1 of 500 N is required to push a car of mass 1000 kg slowly at constant
speed on a leveled road. If a force F2 of 1000 N is applied, the acceleration of
the car will be :
a. Zero
b. 1.5 m/s2
c. 1.0 m/s2
d. 0.5 m/s2
101. 99 Problem
A particle of mass 0.2 kg tied at the end of a spring is being rotated along a
vertical circle of radius 0.5 m at critical speed of 5 m/s. The tension T in the
string at the highest point of its path is :
a. 8.04 N
b. 11.96 N
c. 10 N
d. 1.96 N
102. 100 Problem
The current gain in the common-emitter mode of a transistor is 10. The input
impedance is 20 kΩ and load of resistance is 100 kΩ. The power gain is :
a. 300
b. 500
c. 200
d. 100
