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NAT I Medical Physics MCQs With Answers

Question # 1

The smooth or steady stream-line flow is know as

Choose an answer

Laminar flow

Turbulent flow

Both a and b

None of the above

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Question # 2

The dimensional formula for the modulus of elasticity is same as that for.

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Stress

Strain

Velocity

Surface tension

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Question # 3

The conductivity of a superconductor is

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Infinite

Very large

Very small

Zero

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Question # 4

Copper and germanium are cooled to 70 K from room temperature then

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Resistance of copper increases while that of germanium decreases

Resistance of copper decreases while that of germanium increases

Resistance of both decreases

Resistance of both increases

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Question # 5

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 # 6

As the electron in Bohr orbit of hydrogen atom passes from stat n = 2 to n = 1 the kinetic energy K and potential energy U change as

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K two-fold,U also two-fold

K four-fold,U also four-fold

K four-fold,U two-fold

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Question # 7

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 # 8

A force of 10N is acting along y-axis its component along x-axis is

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10N

20N

100N

Zero N

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Question # 9

The volt/metre is the unit of:

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Potential

Work

Force

Electric field intensity

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