ECAT Pre Engineering Physics Chapter 19 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 19 Dawn of Modern Physics

Try The MCQ's Test For Physics ECAT Pre Engineering Chapter 19 Dawn of Modern Physics

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Physics ECAT Pre Engineering Chapter 19 Dawn of Modern Physics

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Question # 1

If a material object moves with the speed of light 'C' its mass becomes

Question # 2

the symbol to be used in relativity problems denotes:

Question # 3

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

Question # 4

A particle having mass and charge equal to that of an electron is called:

Question # 5

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

Question # 6

Photoelectric effect takes place with a photon of:

Question # 7

The energy of a photon in a beam of infrared radiation of wavelength 1240 nm is

Question # 8

The general theory of relativity treats problems involving

Question # 9

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

Question # 10

A black body is

Question # 11

de-Broglies hypthesis was experimentally verified by

Question # 12

With the help of 50 K v electron microscope, a resolution of

Question # 13

Strictly speaking, the earth is:

Question # 14

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

Question # 15

According to the special theory of relativity

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ECAT Physics Chapter 19 Important MCQ's

Sr.# Question Answer
1 The concept of direction is purely:
A. Absolute
B. Relative
C. Relative to stars always
D. Relative to the sun always
2 Electromagnetic radiation or photons interact with matter in
A. two distinct ways
B. three distinct ways
C. four distinct ways
D. five distinct ways
3 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
4 A high temperature, the proportion of shorter wavelengths radiation, emitted by the body
A. decreases
B. first increases then decreases
C. increases
D. any one of them
5 A black body is
A. an ideal absorber
B. an ideal radiator
C. both of them
D. none of them
6 The inside cavity of the black body is
A. painted white
B. painted silver
C. blackened with soot
D. painted red
7 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
8 The Nobel Prize on the explanation of photoelectric effect was awarded to:
A. Max. Planck
B. Maxwell
C. Bohr
D. Rutherford
9 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
10 The value of the Stephen's constant for black body radiations is given by
A. 5.6 x 108Wm-2K-4
B. 5.67 x 10-8Wm-2K-4
C. 2.9 x 10-3mK
D. 2.9 x 103mK

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