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

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

Question # 2

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

Question # 3

The energy of photon of wavelength 1240 nm is:

Question # 4

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

Question # 5

In a photocell, cesium coated oxidized silver emits electrons for :

Question # 6

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

Question # 7

The photoelectric effect was explained by:

Question # 8

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

Question # 9

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

Question # 10

Interference and diffraction confirm:

Question # 11

The reverse process of photo-electric effect is called:

Question # 12

Photo cells are used for :

Question # 13

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

Question # 14

The number of electrons emitted depend upon

Question # 15

The maximum kinetic energy of emitted photoelectrons depends upon:

Question # 16

In a photocell, sodium and potassium emit electrons for:

Question # 17

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

Question # 18

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

Question # 19

The maximum energy of the photoelectrons depends upon:

Question # 20

The energy of photon of energy 1 eV is:

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MCAT Physics Chapter 15 Important MCQ's

Sr.# Question Answer
1 The maximum energy of the photoelectrons can be determined by making the:
A. Anode positive
B. Anode negative
C. Cathode positive
D. Both (b) & (c)
2 In a photocell, certain metal emits electrons for :
A. Visible light
B. Infrared light
C. Ultraviolet light
D. All of these
3 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
4 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
5 Rest mass energy of electron is:
A. 1.02 MeV
B. 0.51 MeV
C. 931 MeV
D. 200 MeV
6 The energy of photon of wavelength 620 nm is:
A. 0.5 eV
B. 1.0 eV
C. 1.5 eV
D. 2.0 eV
7 In a photocell, cesium coated oxidized silver emits electrons for :
A. Visible light
B. Infrared light
C. Ultraviolet light
D. All of these
8 The reverse process of photo-electric effect is called:
A. Pair production
B. Compton effect
C. Annihilation of matter
D. X-rays
9 A human eye can detect the electromagnetic radiations of the type:
A. Infrared radiations
B. For- infrared radiations
C. X-rays radiations
D. Red radiations
10 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

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