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

When the atomic particle are moving with velocities approaching that of light:

Question # 2

A high temperature, the proportion of shorter wavelengths radiation, emitted by the body

Question # 3

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

Question # 4

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

Question # 5

The value of threshold frequency for different metals is

Question # 6

The threshold frequency of sodium is 6 x 106MHz. The cut-off wavelength for this metal will be

Question # 7

Photocell is a device which converts

Question # 8

According to the special theory of relativity, a moving clock

Question # 9

The mass of an object will be doubled at speed

Question # 10

The special theory of relativity is based on the

Question # 11

The concept of direction is purely:

Question # 12

If a body reaches a speed equal to the speed of light, then its mass will became

Question # 13

The nature of radiations emitted by a hot body depends upon its:

Question # 14

Strictly speaking, the earth is:

Question # 15

When a platinum wire is heated, it appears white at

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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 The concept of direction and position are purely
A. absolute
B. relative
C. absolute or relative
D. none of these
3 Position was discovered by Carl Anderson in
A. 1920
B. 1925
C. 1928
D. 1932
4 Albert Einstein got the Nobel prize in physics for his explanation of photoelectric effect in
A. 1916
B. 1919
C. 1921
D. 1923
5 Which of the following phenomenon proves the particle nature of light
A. interference
B. diffraction
C. photoelectric effect
D. none of these
6 Current, voltage, resistance measuring circuit is connected with the galvanometer with the help of switch, known as
A. ON switch
B. off switch
C. function switch
D. none of these
7 de-Broglies hypthesis was experimentally verified by
A. Maxwell
B. Compton
C. Einstein
D. Davison and Germer
8 the dilation of time applies to the timing processes which are:
A. Physical
B. Chemical
C. Biological
D. All of these
9 The idea of quantization of energy was proposed by:
A. Einstein
B. Max.Planck
C. Maxwell
D. Bohr
10 Intensity of light determines the:
A. Energy of each photon
B. Number of photons
C. Speed of photons
D. Size of photons

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