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

00:00
Question # 1

Which of the particles, electron, proton and neutron moving with same speed has longest wave length?

Question # 2

In Compton effect, it was considered that X-rays consist of:

Question # 3

Photoelectric effect and Compton effect prove the:

Question # 4

J.J Thomson finds:

Question # 5

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

Question # 6

The number of electrons emitted depend upon

Question # 7

In photoelectric effect, electrons are emitted:

Question # 8

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

Question # 9

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

Question # 10

The energy of photon of energy 1 eV is:

Question # 11

Rest mass energy of electron is:

Question # 12

Potassium cathode in photocell emits electrons for a light:

Question # 13

Photo cells is a device which convert light into:

Question # 14

Diffraction pattern has also been observed for:

Question # 15

Interference and diffraction confirm:

Question # 16

The unit of work function is

Question # 17

The stopping potential for a certain metal is 10 volt, the max. Energy of emitted electron is:

Question # 18

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

Question # 19

The dimensions of Planck’s constant “h” are same as that of:

Question # 20

The reverse process of photo-electric effect is called:

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MCAT Physics Chapter 15 Important MCQ's

Sr.# Question Answer
1 Interference and diffraction confirm:
A. Particle nature
B. Wave nature
C. Dual nature
D. None of these
2 The reverse process of photo-electric effect is called:
A. Pair production
B. Compton effect
C. Annihilation of matter
D. X-rays
3 Compton Effect makes the use of the law of conservation of:
A. Energy
B. Momentum
C. Charge
D. Both (a) & (b)
4 In a photocell, sodium and potassium emit electrons for:
A. Visible light
B. Infrared light
C. Ultraviolet light
D. All of these
5 J.J Thomson finds:
A. Particle nature of the electron
B. Dual nature of electron
C. Wave nature of electron
D. Electromagnetic nature of electron
6 In photoelectric effect, electrons are emitted with:
A. Same energy
B. Different energies
C. Both (a) & (b)
D. Intermittent energies
7 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
8 The dimensions of Planck’s constant “h” are same as that of:
A. Momentum
B. Angular momentum
C. Work
D. Torque
9 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
10 Diffraction pattern has also been observed for:
A. Proton
B. Neutron
C. Hydrogen atom
D. All of them

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