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NAT I Medical Physics MCQs With Answers

Question # 1

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 # 2

In an AC circuit a resistance of R ohm i connected in series with an inductance L if phase angle between voltage and current be 45^o the value of inductive reactance will be

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R/4

R/2

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Question # 3

Which of the following four statements is false?

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A body can have zero velocity and still be accelerated

A body can have a constant velocity and still have a varying speed

A body can have a constant speed and still have a varying velocity

The direction of the velocity of a acceleration is constant

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Question # 4

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 # 5

A body 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 # 6

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

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64 W

80 W

100 W

125 W

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Question # 7

Two forces are acting together on an object. The magnitude of their resultant is minimum when the angle between the force is.

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0°

60°

120°

180°

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Question # 8

Band spectrum in produced by

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H₂

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Question # 9

Light appears to travel in straight lines since

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It is not absorbed by the atmosphere

It is reflected by the atmosphere

Its wavelength is very small

Its velocity is very large

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