Question # 1

In photoelectric effect, if we increase the frequency of the incident light then of the electrons increased

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Number

K.E

P.E

Frequency

In order to perform experiment, Davisson and Germer used accelerating voltage of:

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54V

120V

220V

400V

In photoelectric effect, electrons are emitted:

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Slowly

Intermittently

Both (a) & (b)

Instantly

De-Broglie received the Nobel prize in

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1929

1937

1928

1924

De-Broglie received the Nobel prize on his work on:

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Wave nature of particle

Corpuscular nature of wave

Dual nature of particle

All of them

There is a certain frequency below which no electrons are emitted from the metal surface, this frequency is known as:

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Critical frequency

Threshold frequency

Maximum frequency

Minimum frequency

The unit Compton wavelength is same as:

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Compton wavelength

Compton frequency

Compton shift

Both (a) & (b)

A photo cell is based on:

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Compton effect

Pair production

Photo cell

All of these

The energy of photon of wavelength 1240 nm is:

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0.5 eV

1.0 eV

1.5 eV

2.0 eV

Rest mass energy of electron is:

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1.02 MeV

0.51 MeV

931 MeV

200 MeV

Interference and diffraction confirm:

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Particle nature

Wave nature

Dual nature

None of these

Interference and diffraction of light confirms its:

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Particle nature

Dual nature

Wave nature

Electromagnetic nature

The energy of photon of wavelength 620 nm is:

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0.5 eV

1.0 eV

1.5 eV

2.0 eV

Davisson and Germer received the Nobel prize for their work on:

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Wave nature of particle

Corpuscular nature of wave

Dual nature of particle

All of them

Compton Effect makes the use of the law of conservation of:

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Energy

Momentum

Charge

Both (a) & (b)

Photoelectric effect and Compton effect prove the:

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Wave nature of light

Particle nature of light

Dual nature of light

The unit of work function is

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eV

Volt

Farad

Herdz

Diffraction pattern has also been observed for:

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Proton

Neutron

Hydrogen atom

All of them

The reverse process of photo-electric effect is called:

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Pair production

Compton effect

Annihilation of matter

X-rays

The maximum kinetic energy of emitted photoelectrons depends upon:

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The intensity of incident light

Frequency of incident light

Metal surface

Both frequency of incident light and metal surface

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