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NAT I Engineering Physics MCQs With Answers
Question # 1
How does the Young's modulus vary with the increase of temperature?
Choose an answer
Decrease
Increase
Remains constant
First increases and then decreases
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Question # 2
The conductivity of a superconductor is
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Infinite
Very large
Very small
Zero
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Question # 3
A photoelectric cell converts
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Electrical energy to light energy
Light energy to light energy
Light energy to electrical energy
Light energy to elastic energy
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Question # 4
A 220 V, 50 Hz, AC 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
The part of a transistor which is heavily doped to produce large number of majority carriers is
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Emitter
Base
Collector
Any of the above depending on nature of transistor.
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Question # 6
A particle is moving in a uniform magnetic field then
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Its momentum changes but total energy remains the same
Both momentum and total energy remains the same
Both changes
Total energy change but momentum remains
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Question # 7
When boron is added as an impurity to silicon the resulting material is
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n type conductor
n type semiconductor
p-type conductor
p-type semiconductor
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Question # 8
Planck's constant has the dimensions of:
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Energy
Momentum
Frequency
Angular momentum
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Question # 9
A body moves a distance of 10 m along a straight line under the action of a force of 5 Newtons, if the work done is 25 joules the angle which the force takes with the direction of motion of the body is:
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0°
30°
60°
90°
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Question # 10
If a diamagnetic substance is brought near north or south pole of a bar magnet it is
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Attracted by the poles
Repelled by the poles
Repelled by north pole and attracted by the south pole
Attracted by the north pole and repelled by the south pole
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Question # 11
Which of the following sources give discrete emission spectrum?
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Incandescent electric bulb
Sun
Mercury vapour lamp
Candle
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