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NAT I Computer Science Physics MCQs With Answers

Question # 1

For obtaining appreciable extension the wire should be

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Short and thin

Long and thin

Short and tick

Long and thick

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Question # 2

In an ac circuit with voltage V and current 1 the power dissipated is

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1/2 VI

1/√2 VI

Depends on the phase between V and 1

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Question # 3

A person standing near the track of a fast moving train has tendency to fall towards it because of

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Vibration due to motion of train

Gravitation force of attraction between person and trains

The high speed of train

Some other effect

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Question # 4

Boyle's law is applicable in

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Isochoric process

Isothermal process

Isobaric process

Isotonic process

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Question # 5

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 # 6

In an L-R circuit time constant is that time in which current grows from zero to the value

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0.63 I_o

0.50 I_o

0.73 I_o

I_o

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Question # 7

Which of the following particle would experience the largest magnetic force when projected with the same velocity perpendicular to a magnetic field?

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Proton

Electron

He⁺

Li⁺

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Question # 8

The nuclear model of atom was proposed by

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J.J Thomson

E.Rutherford

Neil Bohr

Summerfield

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Question # 9

Planck's constant has the dimensions of:

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Energy

Momentum

Frequency

Angular momentum

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Question # 10

When the displacement is half of the amplitude the ratio of potential energy to the total energy is

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1/2

1/4

1/8

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Question # 11

In a common base transistor circuit the current gain is 0.98.On changing the emitter current by 5.00 mA, the change in collector current is:

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0.196 mA

2.45 mA

4.9 mA

5.1 mA

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