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NAT II Physical Science Physics MCQs With Answers
Question # 1
All of the following statements are correct except
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The total focal length of astronomical telescope is the sum of the focal lengths of its two lenses
The image formed by the astronomical telescope is always erect because the effect of the combination of the two lenses is divergent
The magnification of an astronomical telescope can increases by decreasing the focal length of the eyepiece
The magnifying power of the refracting type of astronomical telescope is the ratio of the focal length of the objective to that of the eye piece
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Question # 2
A boy is dropped from a tower with zero velocity, reaches ground in 4s. The height of the tower is about
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80 m
20 m
160 m
40 m
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Question # 3
One cannot see fog because
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Fog absorbs light
The refractive index of fog is infinity
Light suffers total reflection at the droplet in a fog
Light is scattered by the droplet in fog
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Question # 4
A 220 V, 50 Hz. A.C. source is connected to an inductance of 0.2 H and a resistance of 20 ohm in series. What is the current in the circuit?
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10 A
5 A
33.3 A
3.33 A
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Question # 5
A person standing on a rotating platform has his hands lowered. He suddenly outstretches his arms. The angular momentum
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Becomes zero
Increases
Decreases
Remains the same
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Question # 6
Choose the correct statement
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Both an ammeter and voltmeter should have small resistance
Both an ammeter and a voltmeter should have large resistance
An ammeter should have large resistance and a voltmeter should have small resistance
An ammeter should have small resistance and a voltmeter should have large resistance
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Question # 7
The time period of a simple pendulum is 2 seconds. If its length is increased by 4 times, then its period becomes
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16 s
12 s
8 s
4 s
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Question # 8
Electrons in the atom are held in the atom due to
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Coulomb forces
Nuclear forces
Gravitational forces
Van der Waal's forces
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Question # 9
Boyle's law is applicable in
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Isochoric process
Isothermal process
Isobaric process
Isotonic process
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Question # 10
Two point charges A and B separated by a distance R attract each other with a force of 12 x 10
-3
N. The force between A and B when the charges on them are doubled and distance is halved
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1.92 N
19.2 N
12 N
0.192 N
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Question # 11
Huygen's wave theory of light cannot explain
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Diffraction
Interference
Polarization
Photoelectric effect
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Question # 12
A particle moves along a circular path under the action of a force. The work done by the force is
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Zero
Positive and non-zero
Negative and non zero
None of the above
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Question # 13
The frequency of the incident light falling on a photosensitive metal plate is doubled, the kinetic energy of the emitted photoelectrons is
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Double the earlier value
Unchanged
More than doubled
Less than doubled
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Question # 14
Which of the following is the only vector quantity?
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Temperature
Energy
Power
Momentum
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Question # 15
The force between two charges 0.06 m apart is 5 N. If each charge is moved towards the other by 0.01 m, then the force between them will become
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7.20 N
11.25 N
22.50 N
45.00
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Question # 16
The essential distinction between X-rays and
γ-rays is that
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γ-rays have smaller wavelength than X-rays
γ-rays emanate from nucleus while X-rays emanate from outer part of the atom
γ-rays have greater ionizing power than X-rays
γ-rays are more penetrating than X-rays
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