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

As the light shines on the metal surface, the electrons are ejected

Question # 2

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

Question # 3

Max plank received the Nobel Prize in physics for his discovery of energy quanta in

Question # 4

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

Question # 5

The concept of direction is purely:

Question # 6

Compton studied the scattering of x-rays by loosely bound electrons from:

Question # 7

When a platinum wire is heated, it appears dull red at about

Question # 8

the symbol to be used in relativity problems denotes:

Question # 9

The Nobel Prize on the explanation of photoelectric effect was awarded to:

Question # 10

When a platinum wire is heated, it appears orange red at

Question # 11

G.P. Thomson observer experimentally that electrons and neutrons possess

Question # 12

The existence of position was predicted by Dirace in

Question # 13

The special theory of relativity is based on:

Question # 14

Wave nature of particle was proposed by

Question # 15

The energy of photon 'E' is proported to

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ECAT Physics Chapter 19 Important MCQ's

Sr.# Question Answer
1 The special theory of relatively treats the problems involving:
A. Inertial frames of reference
B. Non-inertial frames
C. Non-accelerated frame
D. Botha (A) and (C)
2 When a platinum wire is heated, it appears dull red at about
A. 500°C
B. 900°C
C. 1100°C
D. 1300°C
3 Photocell is a device which converts
A. chemical energy into electrical energy
B. electrical energy into light energy
C. heat energy into electrical energy
D. light energy into electrical energy
4 Due to relative motion of observer and the frame of reference of events, time always:
A. Dilates itself
B. Contracts itself
C. Stretches itself
D. Both (A) and (C)
5 The special theory of relativity is based on the
A. one postulate
B. two postulates
C. three postulates
D. four postulates
6 Max plank received the Nobel Prize in physics for his discovery of energy quanta in
A. 1900
B. 1906
C. 1912
D. 1918
7 When a platinum wire is heated, it appears white at
A. 1600°C
B. 900°C
C. 1100°C
D. 1300°C
8 The concept of direction is purely:
A. Absolute
B. Relative
C. Relative to stars always
D. Relative to the sun always
9 Position was discovered by Carl Anderson in
A. 1920
B. 1925
C. 1928
D. 1932
10 The photon of radio-waves has energy of about
A. 1 Me V
B. 1 Ke v
C. 10-10e v
D. 1010e v

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