MDCAT Physics Chapter 15 MCQ Test With Answer for (Modern Physics)

MCQ's Test For MDCAT Physics Chapter 15 Modern Physics MCQ's Test

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MDCAT Physics Chapter 15 Modern Physics MCQ's Test

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Question # 1

The number of electrons emitted depend upon

Question # 2

Photo cells is a device which convert light into:

Question # 3

In a photocell, certain metal emits electrons for :

Question # 4

Potassium cathode in photocell emits electrons for a light:

Question # 5

A.H Compton studied the scattering of X-rays by loosely bound electrons from a graph target in:

Question # 6

Davisson and Germer, in their experiment used:

Question # 7

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

Question # 8

The energy of photon of wavelength 1240 nm is:

Question # 9

Diffraction pattern has also been observed for:

Question # 10

A photo cell is based on:

Question # 11

In photoelectric effect, electrons are emitted:

Question # 12

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

Question # 13

The maximum kinetic energy of emitted photoelectrons depends upon:

Question # 14

In order to increase the K.E of ejected photo electrons, there should be an increase in:

Question # 15

The minimum energy required by an electron to eject from metal surface is known as:

Question # 16

Interference and diffraction of light confirms its:

Question # 17

In photoelectric effect, electrons are emitted with:

Question # 18

J.J Thomson finds:

Question # 19

Rest mass energy of electron is:

Question # 20

Interference and diffraction confirm:

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MCAT Physics Chapter 15 Important MCQ's

Sr.# Question Answer
1 De-Broglie received the Nobel prize on his work on:
A. Wave nature of particle
B. Corpuscular nature of wave
C. Dual nature of particle
D. All of them
2 There is a certain frequency below which no electrons are emitted from the metal surface, this frequency is known as:
A. Critical frequency
B. Threshold frequency
C. Maximum frequency
D. Minimum frequency
3 The minimum energy required by an electron to eject from metal surface is known as:
A. Photo energy
B. Critical energy
C. Threshold energy
D. Work function
4 Diffraction pattern has also been observed for:
A. Proton
B. Neutron
C. Hydrogen atom
D. All of them
5 Davisson and Germer received the Nobel prize for their work on:
A. Wave nature of particle
B. Corpuscular nature of wave
C. Dual nature of particle
D. All of them
6 In order to increase the K.E of ejected photo electrons, there should be an increase in:
A. Intensity of radiation
B. NoneI
C. Frequency of radiation
D. Both (b) & (c)
7 In a photocell, certain metal emits electrons for :
A. Visible light
B. Infrared light
C. Ultraviolet light
D. All of these
8 Interference and diffraction confirm:
A. Particle nature
B. Wave nature
C. Dual nature
D. None of these
9 Which of the particles, electron, proton and neutron moving with same speed has longest wave length?
A. Electron
B. Proton
C. Neutron
D. All have same
10 Photo cells is a device which convert light into:
A. Wave nature
B. Particle nature
C. Particle wave nature
D. Dual nature

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