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Online Tests
Ics Part 2 Physics Chapter 8 Test Online MCQs With Answers
Question # 1
In 1905, the special theory of relativity was proposed by
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Einstein
Bohr
Maxwell
De Broglie
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Question # 2
The converses of annihilation of matter is:
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Photoelectric effect
Relativistic effect
Pair production
Compton effect
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Question # 3
Earth orbital speed is.
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10 km/s
20 km/s
30 km/s
40 km/s
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Question # 4
The value of Wien's constant:
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2.9x10
-3
mk
2.19x10
-7
mk
3.18 x10
6
km
-1
6.21 x 10
-9
m
2
wk
3
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Question # 5
The maximum kinetic energy of emitted photo electrons depends upon.
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The intensity of incident light
Frequency of the incident light
Metal surface
Both frequency of incident light and metal surface.
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Question # 6
The quantity/factor h/m
o
c has the dimensions of.
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Length
Time
Mass
Energy
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Question # 7
Minimum energy needed to escape an electron ofrm metal surface is called:
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Threshold energy
Threshold frequency
Work function
Work ability
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Question # 8
In Compton effect the photon behaves as a.
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Wave
Particle
Nucleon
Both a and b
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Question # 9
Photo electrons are emitted y using visible light when the metal is.
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sodium
Copper
Nicked
Cobalt
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Question # 10
Wave nature of particle was given by:
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Clemensen
Louis de Broglie
Laster H. Germer
Clinton S. Davisson
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Question # 11
Antiparticle of electron is.
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proton
Photon
Positron
Neutron
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Question # 12
Which is the most refined form of matter.
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Smoke
Fog
Light
Electron
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Question # 13
The unit for Plank's constant is:
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Js
-1
Jm
Js
Jm
2
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Question # 14
A block body is an ideal:
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Absorber
Radiator
Both a & b
None of above
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Question # 15
Energy of Black body radiation depends upon
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Nature of surface of body
Nature of material of body
Shape and size of body
Temperature of the body
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Question # 16
Compton's effect is associated with
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gamma rays
Beta rays
X rays
Positive rays
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Question # 17
The concept of direction is purely
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Relative
Absolute
Relative to the motion
None of these
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Question # 18
The stopping potential for a certain metal is 10 volts. Thus work function for the cathode is.
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10 J
1.6 X 10
-18
J
1.6 X 10
-19
J
1.6 X 10
30
J
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