Question # 1

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

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

A moving charge will gain energy due to the application of

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Electric field

Magnetic

Both of these

None of these

Huygen's wave theory of light cannot explain

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Diffraction

Interference

Polarization

Photoelectric effect

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

Boyle's law is applicable in

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Isochoric process

Isothermal process

Isobaric process

Isotonic process

A particle moving in a magnetic field has increase in its velocity then its radius of the circle

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Decreases

Increases

Remains the same

Becomes half

Two point charge +3μC and +8μC repel each other with a force of 40 N. if a charge of -5μC is added to each of them then the force between will become

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-10N

+10N

+20N

-20N

Bernoulli's equation is based upon law of conservation

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Mass

Momentum

Energy

None of these

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

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 Engineering Physics MCQs With Answers

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