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

The ratio of energy E to the corresponding frequency (f) of the radiation (emitted or absorbed) is called:

Question # 2

Compton derived an expression to find compton shift by applying to the process, the law of conservation of:

Question # 3

The concept of direction is purely:

Question # 4

The idea of quantization of energy was proposed by:

Question # 5

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

Question # 6

When a position comes close to an electron they annihilate into

Question # 7

The general theory of relativity treats problems involving

Question # 8

de-Broglies hypthesis was experimentally verified by

Question # 9

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

Question # 10

Photoelectric effect takes place with a photon of:

Question # 11

The special theory of relativity treats problems invoving

Question # 12

If A represents linear momentum and c, the velocity of light, then unit of pc in international system of units is:

Question # 13

Albert Einstein got the Nobel prize in physics for his explanation of photoelectric effect in

Question # 14

The length contraction happens only

Question # 15

Max plank founded a mathematical model resulting in an equation that describes the shape of observed black body radiation curves exactly, in

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ECAT Physics Chapter 19 Important MCQ's

Sr.# Question Answer
1 In order to produce pair production, a photon must have a energy
A. 0.511 Me v
B. 0.256 Me v
C. 1.02 Me v
D. 0.956 Me v
2 Absolute motion cannot be detected
A. in its own frame of references
B. in a different frame of references
C. both in its frame and different frame of references
D. none of these
3 The special theory of relativity is based on the
A. one postulate
B. two postulates
C. three postulates
D. four postulates
4 Max plank founded a mathematical model resulting in an equation that describes the shape of observed black body radiation curves exactly, in
A. 1890
B. 1895
C. 1900
D. 1905
5 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
6 The idea of quantization of energy was proposed by:
A. Einstein
B. Max.Planck
C. Maxwell
D. Bohr
7 Converse of pair production is known as
A. Compton effect
B. annihilation of matter
C. photoelectric effect
D. none of these
8 The energy of photon 'E' is proported to
A. The magnetic field H
B. The electric field E
C. Both the electric and magnetic field H and E
D. Frequency
9 There is certain frequency below which no electrons are emitted from the metal surface, this frequency is known as
A. maximum frequency
B. minimum frequency
C. threshold frequency
D. all of these
10 The photoelectric effect, the maximum energy of photoelectrons depends on the
A. particular metal surface
B. frequency of incident light
C. both of them
D. none of them

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