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NAT I Computer Science Physics MCQs With Answers

Question # 1

A (100 W, 200 V) bulb is connected to a 160 V power supply. The power consumption would be

Choose an answer

64 W

80 W

100 W

125 W

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Question # 2

Absolute temperature can be calculated by

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Mean square velocity

Motion of the molecule

Both (A) and (B)

None of these

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Question # 3

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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Question # 4

According to the Hooke's law the force required to change the length of a wire by '1' is proportional to

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1^-2

1^-1

1²

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Question # 5

Band spectrum in produced by

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H₂

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Question # 6

The twinkling of stars is due to

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The fact that stars do not emit light continuously

The refractive index of the earth's atmosphere fluctuate

Intermittent absorption of star light by its own atmosphere

None of them

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Question # 7

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 # 8

A point charge Q is placed at the mid-point of a line joining two charges 4q and q. if the net force on charge q is zero. then Q must be equal to

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-q

-2q

+4q

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Question # 9

A cable breaks if stretched by more than 2 mm it is cut into two equal parts how much either part can be stretched without breaking?

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0.25 m

0.5 m

1 mm

2 mm

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Question # 10

The average binding energy of a nucleon inside an atomic nucleus is about

Choose an answer

8 MeV

8 eV

8 Joules

8 ergs

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Question # 11

The peak voltage in a 200 volt A.C supply is nearly

Choose an answer

220

253

311

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