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 analysis of the distribution of wavelengths of the radiation emitted from a hot body set the foundation of new mechanics, known as

Question # 2

The way through which electromagnetic radiations or photons interact with matter depends upon their:

Question # 3

The length contraction happens only

Question # 4

Electromagnetic -radiation means:

Question # 5

Compton derived an expression to find compton shift by applying to the process, the law of conservation of:

Question # 6

When a position comes close to an electron they annihilate into

Question # 7

Pair production is the phenomenon in which

Question # 8

The location and speed anywhere on earth can now be determined using relativistic effects by NAVISTAR to an accuracy of

Question # 9

According to the special theory of relativity

Question # 10

S.I. unit of planks constant is

Question # 11

The special theory of relativity is based on the

Question # 12

Albert Einstein got the Nobel prize in physics for his explanation of photoelectric effect in

Question # 13

Compton shift refers to:

Question # 14

The value of the plank's constant 'h' is given by

Question # 15

The year when A.H. compton was awarded Nobel Prize is:

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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 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
3 Position was discovered by Carl Anderson in
A. 1920
B. 1925
C. 1928
D. 1932
4 The whole shape of the black body spectrum for all wavelengths was explained by the formula proposed by
A. Max plank
B. Newton
C. Einstein
D. J.J. Thomson
5 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
6 Electromagnetic radiation or photons interact with matter in
A. two distinct ways
B. three distinct ways
C. four distinct ways
D. five distinct ways
7 Wien's constant is measured in:
A. Metre per kelviin
B. Metre kelvin
C. Kelvin per meter
D. Joules
8 The general theory of relativity treats problems involving
A. inertial frame of references
B. accelerating frame of references
C. both of these
D. none of these
9 the symbol to be used in relativity problems denotes:
A. Dilated time
B. Proper time
C. Life time
D. Half time
10 The existence of position was predicted by Dirace in
A. 1920
B. 1925
C. 1930
D. 1928

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