ECAT Pre Computer Science Chapter 19 MCQ Test With Answer

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 idea of quantization of energy was proposed by:

Question # 2

Victor de-Brogile received the Nobel prize in physics in

Question # 3

According to the electromagnetic wave theory of light, increasing the intensity of incident light should increase the

Question # 4

S.I. unit of planks constant is

Question # 5

Which of the following is not an example of intertial frame

Question # 6

The special theory of relatively treats the problems involving:

Question # 7

Due to relative motion of observer and the frame of reference of events, time always:

Question # 8

Compton shift refers to:

Question # 9

As compared to the distance measured by an observer on Earth, the distance from Earth to a star measured by an observer in a moving spaceship would seem:

Question # 10

Intensity of light determines the:

Question # 11

Practically the quantity v/c is always:

Question # 12

According to the special theory of relativity, time is

Question # 13

In process of annihilation of matter, the two photons produced move in opposite direction to converse

Question # 14

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

Question # 15

Converse of pair production is known as

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ECAT Physics Chapter 19 Important MCQ's

Sr.# Question Answer
1 An intertial frame of reference is a frame of reference which is
A. at rest
B. moving with uniform velocity
C. either at rest or moving with uniform velocity
D. none of these
2 Position was discovered by Carl Anderson in
A. 1920
B. 1925
C. 1928
D. 1932
3 The concept of direction and position are purely
A. absolute
B. relative
C. absolute or relative
D. none of these
4 The concept of direction is purely:
A. Absolute
B. Relative
C. Relative to stars always
D. Relative to the sun always
5 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
6 The analysis of the distribution of wavelengths of the radiation emitted from a hot body set the foundation of new mechanics, known as
A. classical mechanics
B. Newtonian mechanics
C. quantum mechanics
D. statistical mechanics
7 Strictly speaking, the earth is:
A. An accelerated frame of reference
B. A non-inertial frame of reference
C. An inertial frame of reference
D. A non-accelerated frame of reference
8 The inside cavity of the black body is
A. painted white
B. painted silver
C. blackened with soot
D. painted red
9 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
10 Compton derived an expression to find compton shift by applying to the process, the law of conservation of:
A. Energy only
B. Momentum only
C. Mass only
D. Charge only

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