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

Wien's constant is measured in:

Question # 2

The concept of direction is purely:

Question # 3

The special theory of relativity is based on:

Question # 4

Electromagnetic -radiation means:

Question # 5

From the theory of relativity, momentum p of the photon is related to energy as

Question # 6

Which of the following phenomenon proves the particle nature of light

Question # 7

Absolute motion cannot be detected

Question # 8

The existence of position was predicted by Dirace in

Question # 9

Davision and Germer performed experiment to verify

Question # 10

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

Question # 11

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

Question # 12

The concept of direction and position are purely

Question # 13

When a high energy photon interact with a metal, which of the following effect is most likely to be taken place

Question # 14

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

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 With the help of 50 K v electron microscope, a resolution of
A. 0.5 to 1 m to possible
B. 1 m to 10 m is possible
C. 0.5 to 1 nm is possible
D. 1 to 10 nm is possible
2 Max plank received the Nobel Prize in physics for his discovery of energy quanta in
A. 1900
B. 1906
C. 1912
D. 1918
3 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
4 The Nobel Prize on the explanation of photoelectric effect was awarded to:
A. Max. Planck
B. Maxwell
C. Bohr
D. Rutherford
5 The concept of direction and position are purely
A. absolute
B. relative
C. absolute or relative
D. none of these
6 The whole shape of the black body spectrum for all wavelengths was explained by the formula proposed by
A. Max plank
B. Newton
C. Einstein
D. J.J. Thomson
7 S.I. unit of planks constant is
A. J-s-1
B. J.s
C. J.s-2
D. J.s2
8 The value of the plank's constant 'h' is given by
A. 1.6 x 10-19J
B. 1.67 x 10-27Kg
C. 6.63 x 1034Js
D. 6.63 x 10-34Js
9 The value of threshold frequency for different metals is
A. different
B. same
C. may be different or may be same
D. none of these
10 Wien's constant is measured in:
A. Metre per kelviin
B. Metre kelvin
C. Kelvin per meter
D. Joules

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