Question # 1

The Nobel Prize on the explanation of photoelectric effect was awarded to:

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Max. Planck

Maxwell

Bohr

Rutherford

None of these

de-Broglies hypthesis was experimentally verified by

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Maxwell

Compton

Einstein

Davison and Germer

When a platinum wire is heated, it appears dull red at about

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500°C

900°C

1100°C

1300°C

0.1 kg mass will be equivalent to the energy

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9 x 10¹⁵J

5 x 10⁸J

6 x 10¹⁶J

9 x 10^-16J

An intertial frame of reference is a frame of reference which is

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at rest

moving with uniform velocity

either at rest or moving with uniform velocity

none of these

The value of threshold frequency for different metals is

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different

same

may be different or may be same

none of these

The energy of a photon is represented by

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h/c²

h/T

hc²

hf/c²

If A represents linear momentum and c, the velocity of light, then unit of pc in international system of units is:

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Newton

Joule

Joule-Sec

Joule-s^-1

Watt

Compton shift refers to:

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Photon

Meson

Proton

Positron

Both (B) and (D)

The special theory of relativity is based on the

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one postulate

two postulates

three postulates

four postulates

According to the de-Brogile relation, an object of large mass and ordinary speed has

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very small wavelength

very large wavelength

very small frequency

all of these

Photoelectrons are emitted when ultraviolet light falls on:

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Casium

Silver

Potassium

Any of these

None of these

The intensity of emitted energy (with wavelength) radiated from a black body at different temperatures was initially measured by:

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Lummer

Planck

Pringsheim

Both (A ) and (B)

Both (A) and (C)

Converse of pair production is known as

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Compton effect

annihilation of matter

photoelectric effect

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

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