Question # 1

The structure of solids is investigated by using

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Cosmic Rays

X-rays

Intra red Radiation

y-rays

What is the average energy of N molecules of monoatomic gas?

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1/2 NkT

NkT

3/2 NkT

5/2 NkT

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

With the increase of temperature viscosity

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Increase

Decrease

Remains same

Doubles

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

+q

-2q

+4q

When we apply reverse bias to a junction diode it

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Lowers the potential barrier

Raises the potential barrier

Increase the majority carrier current

Decrease the majority carrier current

The volt/metre is the unit of:

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Potential

Work

Force

Electric field intensity

If the metal bob is a simple pendulum is replaced by a wooden bob, then its time period will

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Increase

Decreases

Remain the same

First 'A' then 'B'

The frequency of the incident light falling on a photosensitive metal plate is doubled the kinetic energy of the emitted photoelectrons is

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Double the earlier value

Unchanged

More than doubled

Less than doubled

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NAT I Medical Physics MCQs With Answers

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