Question # 1

Compton was awarded Nobel prize in physics in

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1921

1923

1925

1927

Photocell is a device which converts

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chemical energy into electrical energy

electrical energy into light energy

heat energy into electrical energy

light energy into electrical energy

As the light shines on the metal surface, the electrons are ejected

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slowly

instantaneously

either of these

none of these

In the compton's effect, it is found that the wavelength of incident x-rays is

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greater than the wavelength of scattered x-rays

equal to the wavelength of scattered x-rays

less than the wavelength of scattered x-rays

any one of these

S.I. unit of planks constant is

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J-s^-1

J.s

J.s^-2

J.s²

The ratio of energy E to the corresponding frequency (f) of the radiation (emitted or absorbed) is called:

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Wien's constant

Stefen's constnat

Planck's constant

Boltzmann's constant

None of these

Wave nature of particle was proposed by

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Einstein

Plank

De-Brogile

Max well

The special theory of relatively treats the problems involving:

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Inertial frames of reference

Non-inertial frames

Non-accelerated frame

Botha (A) and (C)

Both (B) and (C)

The special theory of relativity treats problems invoving

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inertial frame of references

accelerating frame of references

both of these

none of these

In process of annihilation of matter, the two photons produced move in opposite direction to converse

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momentum

charge

energy

mass

the dilation of time applies to the timing processes which are:

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Physical

Chemical

Biological

All of these

None of these

Momentum is a parameter associated with

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wave motion

particle motion

neither wave nor particle motion

none of these

According to the special theory of relativity, time is

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absolute quantity

not absolute quantity

constant quantity

none of these

According to the special theory of relativity

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mass and energy are same entities

mass and energy are same entities but interconverible

mass and energy are different entities but interconverible

mass and energy are different entities but non-interconveritble

The nature of radiations emitted by a hot body depends upon its:

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Metarial

Temperature

colour

Volume

Length

Which of the following is not an example of intertial frame

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a body placed on the surface of earth

a body placed in a car moving with uniform velocity

a body placed in a car moving with same acceleration

none of these

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