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NAT I Medical Physics MCQs With Answers

Question # 1

Two sources of sound are said to be coherent if

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They produce sounds of equal intensity

They produce sounds of equal frequency

They produce sound waves vibrating with the same phase

They produce sound waves with zero or constant phase difference all instant of time

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Question # 2

To make the frequency double of na oscillator we have to

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Double the mass

Half the mass

Quadruple the mass

Reduce the mass to one-fourth

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Question # 3

A pendulum clock set to give correct time in Karachi is taken to Quetta it would give correct time if

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The mass of the pendulum is increased

The mass of the pendulum is decreased

The length of the pendulum os increased

The length of the pendulum is decreased

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Question # 4

Center of mass is a point

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Which is geometric center of a body

From which distance of particles are same

Where the whole mass of the body is supposed to be centered

Which is the origin of reference frame

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Question # 5

Ball pen function on the principle of

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Viscosity

Boyle's law

Gravitational force

Surface tension

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Question # 6

A motorist travels A to B at a speed at 40 km/h and returns at speed of 60 km/h. His average speed will be:

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40 km/h

48 km/h

50 km/h

60 km/h

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Question # 7

A person standing on a rotating platform has his hands lowered He suddenly outstretches his arms.The angular momentum

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Becomes zero

Increases

Decreases

Remains the same

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Question # 8

A 2 kg body and a 3 kg body have equal momentum if the kinetic energy of 3 kg body is 10 j, the KE of 2 kg body will be

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6.66 j

15 j

22.5 j

45 j

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Question # 9

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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