ECAT Pre Computer Science Chapter 19 MCQ Test With Answer

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 shift refers to:

Question # 2

Max Planck received the Nobel Prize for his discovery of energy quants in:

Question # 3

Compton was awarded Nobel prize in physics in

Question # 4

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

Question # 5

The inside cavity of the black body is

Question # 6

When a platinum wire is heated, it appears orange red at

Question # 7

Strictly speaking, the earth is:

Question # 8

According to the special theory of relativity, time is

Question # 9

Photoelectrons are emitted when ultraviolet light falls on:

Question # 10

The energy of a photon is represented by

Question # 11

G.P. Thomson observer experimentally that electrons and neutrons possess

Question # 12

the dilation of time applies to the timing processes which are:

Question # 13

Electromagnetic -radiation means:

Question # 14

Electromagnetic radiation or photons interact with matter in

Question # 15

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:

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ECAT Physics Chapter 19 Important MCQ's

Sr.# Question Answer
1 Compton shift refers to:
A. Photon
B. Meson
C. Proton
D. Positron
2 G.P. Thomson observer experimentally that electrons and neutrons possess
A. particle-like properties
B. wave-like properties
C. neither particle nor wave like properties
D. none of these
3 0.1 kg mass will be equivalent to the energy
A. 9 x 1015J
B. 5 x 108J
C. 6 x 1016J
D. 9 x 10-16J
4 Intensity of light determines the:
A. Energy of each photon
B. Number of photons
C. Speed of photons
D. Size of photons
5 The concept of direction is purely:
A. Absolute
B. Relative
C. Relative to stars always
D. Relative to the sun always
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 The threshold frequency of sodium is 6 x 106MHz. The cut-off wavelength for this metal will be
A. 500 m
B. 500 nm
C. 500 km
D. 500 cm
8 The ratio of energy E to the corresponding frequency (f) of the radiation (emitted or absorbed) is called:
A. Wien's constant
B. Stefen's constnat
C. Planck's constant
D. Boltzmann's constant
9 A particle having mass and charge equal to that of an electron is called:
A. Proton
B. Positron
C. Pion
D. Pi-meson
10 The nature of radiations emitted by a hot body depends upon its:
A. Metarial
B. Temperature
C. colour
D. Volume

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