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

Compton was awarded Nobel prize in physics in

Question # 2

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

Question # 3

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

Question # 4

Davision and Germer performed experiment to verify

Question # 5

The special theory of relativity is based on:

Question # 6

Victor de-Brogile received the Nobel prize in physics in

Question # 7

Photocell is a device which converts

Question # 8

Which one of the following physical quantities changes with relativistic speed

Question # 9

According to Einstein, with the great increase in the speed of the body the relativistic length of the body

Question # 10

The ratio of energy E to the corresponding frequency (f) of the radiation (emitted or absorbed) is called:

Question # 11

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

Question # 12

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 # 13

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

Question # 14

The idea of quantization of energy was proposed by:

Question # 15

An intertial frame of reference is a frame of reference which is

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ECAT Physics Chapter 19 Important MCQ's

Sr.# Question Answer
1 Davision and Germer performed experiment to verify
A. de-Brogile hypothesis
B. theory of relativity
C. Newton's law of gravitation
D. Mass-energy relation
2 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:
A. Smaller
B. Lerger
C. Same
D. Much larger
3 When a platinum wire is heated, it appears white at
A. 1600°C
B. 900°C
C. 1100°C
D. 1300°C
4 Practically the quantity v/c is always:
A. less than one
B. Equal to one
C. Greater then one
D. all of these
5 The value of the plank's constant 'h' is given by
A. 1.6 x 10-19J
B. 1.67 x 10-27Kg
C. 6.63 x 1034Js
D. 6.63 x 10-34Js
6 The special theory of relativity treats problems invoving
A. inertial frame of references
B. accelerating frame of references
C. both of these
D. none of these
7 Compton shift refers to:
A. Photon
B. Meson
C. Proton
D. Positron
8 the dilation of time applies to the timing processes which are:
A. Physical
B. Chemical
C. Biological
D. All of these
9 Wave nature of particle was proposed by
A. Einstein
B. Plank
C. De-Brogile
D. Max well
10 the symbol to be used in relativity problems denotes:
A. Dilated time
B. Proper time
C. Life time
D. Half time

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