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

The maximum energy of the photoelectrons can be determined by making the:

Question # 3

The maximum kinetic energy of emitted photoelectrons depends upon:

Question # 4

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

Question # 5

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

Question # 6

Diffraction pattern has also been observed for:

Question # 7

A human eye can detect the electromagnetic radiations of the type:

Question # 8

A human eye can detect the electromagnetic radiations of the type:

Question # 9

Potassium cathode in photocell emits electrons for a light:

Question # 10

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

Question # 11

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

Question # 12

The energy of photon of energy 1 eV is:

Question # 13

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

Question # 14

In a photocell, certain metal emits electrons for :

Question # 15

The reverse process of photo-electric effect is called:

Question # 16

Photo cells are used for :

Question # 17

J.J Thomson finds:

Question # 18

In a photocell, sodium and potassium emit electrons for:

Question # 19

The maximum energy of the photoelectrons depends upon:

Question # 20

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

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MCAT Physics Chapter 15 Important MCQ's

Sr.# Question Answer
1 Rest mass energy of electron is:
A. 1.02 MeV
B. 0.51 MeV
C. 931 MeV
D. 200 MeV
2 Photoelectric effect and Compton effect prove the:
A. Wave nature of light
B. Particle nature of light
C. Dual nature of light
D. Dual nature of light
3 Joule-second is the unit of:
A. Energy
B. Heat
C. Planck’s constant
D. None of these
4 Compton Effect makes the use of the law of conservation of:
A. Energy
B. Momentum
C. Charge
D. Both (a) & (b)
5 The photoelectric effect was explained by:
A. Einstein
B. Davison
C. Hertz
D. Planck
6 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
7 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
8 The stopping potential for a certain metal is 10 volt, the max. Energy of emitted electron is:
A. 10 J
B. 100 J
C. 1.6 × 10-18 J
D. 1.6 × 10-19 J
9 G.P Thomson revealed:
A. Particle nature of electron
B. Dual nature of electron
C. Wave nature of electron
D. Electromagnetic nature of electron
10 De-Broglie received the Nobel prize in
A. 1929
B. 1937
C. 1928
D. 1924

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