ECAT Pre Computer Science Chapter 19 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 19 Dawn of Modern Physics

Try The MCQ's Test For ECAT Physics Chapter 19 Dawn of Modern Physics

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ECAT Physics Chapter 19 Dawn of Modern Physics

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Question # 1

According to Einstein, with the great increase in the speed of the body the relativistic length of the body

Question # 2

The inside cavity of the black body is

Question # 3

Which of the following phenomenon proves the particle nature of light

Question # 4

The Stephen-Boltzmann law for the black body radiation is given by

Question # 5

The existence of position was predicted by Dirace in

Question # 6

With the help of 50 K v electron microscope, a resolution of

Question # 7

de-Broglies hypthesis was experimentally verified by

Question # 8

According to the de-Brogile relation, an object of large mass and ordinary speed has

Question # 9

A non-inertial frame of reference is one, in which

Question # 10

In the compton's effect, it is found that the wavelength of incident x-rays is

Question # 11

When a position comes close to an electron they annihilate into

Question # 12

The emission of electrons from a metal surface when exposed to light of suitable frequency is called the

Question # 13

Max Planck received the Nobel Prize for his discovery of energy quants in:

Question # 14

When monochromatic light is allowed to fall on cathode, it begins to emit electrons, these electrons are called

Question # 15

Photocell is a device which converts

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ECAT Physics Chapter 19 Important MCQ's

Sr.# Question Answer
1 Albert Einstein got the Nobel prize in physics for his explanation of photoelectric effect in
A. 1916
B. 1919
C. 1921
D. 1923
2 Electromagnetic radiation or photons interact with matter in
A. two distinct ways
B. three distinct ways
C. four distinct ways
D. five distinct ways
3 According to the special theory of relativity
A. mass and energy are same entities
B. mass and energy are same entities but interconverible
C. mass and energy are different entities but interconverible
D. mass and energy are different entities but non-interconveritble
4 The mass of an object will be doubled at speed
A. 1.6 x 108ms-1
B. 2.6 X 108ms-1
C. 2.6 x 107ms-1
D. 2.6 x 109ms-1
5 Which of the following phenomenon proves the particle nature of light
A. interference
B. diffraction
C. photoelectric effect
D. none of these
6 The special theory of relativity treats problems invoving
A. inertial frame of references
B. accelerating frame of references
C. both of these
D. none of these
7 The concept of direction is purely:
A. Absolute
B. Relative
C. Relative to stars always
D. Relative to the sun always
8 The Nobel Prize on the explanation of photoelectric effect was awarded to:
A. Max. Planck
B. Maxwell
C. Bohr
D. Rutherford
9 The special theory of relativity is based on the
A. one postulate
B. two postulates
C. three postulates
D. four postulates
10 In the compton's effect, it is found that the wavelength of incident x-rays is
A. greater than the wavelength of scattered x-rays
B. equal to the wavelength of scattered x-rays
C. less than the wavelength of scattered x-rays
D. any one of these

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