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Online Tests
Physics Fsc Part 2 Chapter 8 Online Test MCQs With Answers
Question # 1
Which is the most refined form of matter.
Choose an answer
Smoke
Fog
Light
Electron
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Question # 2
Joule second is the unit of.
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Energy
Wein's constant
Planck's constant
Boyle's law
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Question # 3
The uncertainty principle was given by
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De-Broglie
Heisenberg
Einstein
Max Planck
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Question # 4
Unit of Stephen's constant is
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W m K
-2
W m
-2
K
-4
W m K
-4
None
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Question # 5
When platinum is it becomes orange at.
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500
o
C
900
o
C
1100
o
C
1300
o
C
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Question # 6
Platinum wire becomes yellow at a temperature of.
Choose an answer
900
o
C
1300
o
C
1600
o
C
500
o
C
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Question # 7
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 # 8
If an object moves with speed of light, its mass will be.
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Zero
Maximum
Minimum
infinity
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Question # 9
The emission of electrons from metal surface when exposed to light is called:
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Compton effect
Pair production
Photoelectric effect
None of above
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Question # 10
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 # 11
The minimum energy required for occurrence of pair production is:
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1.022eV
1.02keV
1.02Me.V
1.04MeV
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Question # 12
Maximum Compton shift is observed at.
Choose an answer
30
o
C
90
o
C
45
o
C
180
o
C
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Question # 13
The materialization of energy take place in the process of.
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Photo electric effect
Compton Effect
Pair production
Annihilationof matter
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Question # 14
Pair production cannto take place in vacuum because :
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Mass in not conserved
Momentum is not conserved
Energy is not conserved
Charge is not conserved
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Question # 15
1 kg mass will be equivalent to energy.
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9 x 10
8
J
9 X 10
12
J
9 X 10
16
J
9 X 10
19
J
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Question # 16
The physical quantity related to photon, that does not change in Compton scattering is.
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Energy
Speed
Frequency
Wavelength
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Question # 17
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 # 18
When a very high energy modeules such as y radiation interact with matter, the phenomenon arising will be.
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Photoelectric effect
Compton effect
Pair production
Annihilation of matter
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