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NAT I Computer Science Physics MCQs With Answers

Question # 1

How does the Young's modulus vary with the increase of temperature?

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Decrease

Increase

Remains constant

First increases and then decreases

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Question # 2

The average power dissipation in a pure capacitor in AC circuit is

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1/2 CV²

CV²

2CV²

Zero

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Question # 3

Two point charge +3μC and +8μC repel each other with a force of 40 N. if a charge of -5μC is added to each of them then the force between will become

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-10N

+10N

+20N

-20N

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Question # 4

A p-n junction has a thickness of the order of

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1 cm

1 mm

10^-6 cm

10^-12 cm

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Question # 5

Which of the following is the only vector quantity

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Temperature

Energy

Power

Momentum

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Question # 6

The de broglie wave corresponding to a particle of mass m and velocity v has a wavelength associated with it

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h/mv

hm v

mh/v

m/hv

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Question # 7

If in a moving coil galvanometer a current 1 produces a deflection θ then

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i ∞ tan θ

i ∞ θ²

i ∞ θ

i ∞ √θ

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Question # 8

The direction of induced current is such that it opposes the very cause that has produced it This is the law of

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Lenz

Faraday

Kirchoff

Fleming

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Question # 9

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 # 10

The minimum wavelength of the X-rays produced by electrons accelerated through a potential difference of V volts is directly proportional to

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√V

V²

1/√V

1/V

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Question # 11

In which case dose the potential energy decreases?

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On compressing a spring

On stretching s spring

One moving a body against gravitational force

One the rising of an air bubble in water

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