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 idea of quantization of energy was proposed by:

Question # 2

Newton's law of motion do not hold in

Question # 3

There is no way to detect:

Question # 4

The speed of a pendulum is measured to be 3.0 s in the inertial reference frame of the pendulum. What is its period measured by an observer moving at a speed of 0.95 c with respect to the pendulum

Question # 5

When platinum wire is heated, it appears cherry red at

Question # 6

The general theory of relativity treats problems involving

Question # 7

The existence of position was predicted by Dirace in

Question # 8

At the temperature, a body emits radiation which is principally

Question # 9

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

Question # 10

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

Question # 11

According to the special theory of relativity

Question # 12

The mass of an object will be doubled at speed

Question # 13

The stopping voltage for a certain metal is 100 volts, then the work function for the cathode plate is

Question # 14

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

Question # 15

Strictly speaking, the earth is:

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ECAT Physics Chapter 19 Important MCQ's

Sr.# Question Answer
1 The concept of direction and position are purely
A. absolute
B. relative
C. absolute or relative
D. none of these
2 Compton shift refers to:
A. Photon
B. Meson
C. Proton
D. Positron
3 Albert Einstein got the Nobel prize in physics for his explanation of photoelectric effect in
A. 1916
B. 1919
C. 1921
D. 1923
4 Electromagnetic radiation or photons interact with matter in
A. two distinct ways
B. three distinct ways
C. four distinct ways
D. five distinct ways
5 The energy of a photon is represented by
A. h/c2
B. h/T
C. hc2
D. hf/c2
6 According to the special theory of relativity, time is
A. absolute quantity
B. not absolute quantity
C. constant quantity
D. none of these
7 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
8 Photoelectrons are emitted when ultraviolet light falls on:
A. Casium
B. Silver
C. Potassium
D. Any of these
9 Which of the following phenomenon proves the particle nature of light
A. interference
B. diffraction
C. photoelectric effect
D. none of these
10 When platinum wire is heated, then at the temperature of 500 oC, it becomes:
A. Yellow
B. Orange red
C. Dull red
D. White

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