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Physics FSC Part 2 Chapter 21 Online MCQ's Test MCQs With Answers
Question # 1
Marie Curie and Pierre Curie discovered.
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Uranium
Uranium and Radium
Polonium and radium
Radium
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Question # 2
Unit of decay constant
λ is:
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ms
m
-1
m
S
-1
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Question # 3
The radio active nuclide
86
Ra
228
decays by a series of emissions of three alpha particles and one beta particle. The nuclide X finally formed is:
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64
X
220
86
X
222
84
X
216
88
X
215
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Question # 4
1 amu is equal to
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1.0606 x 10
-27
kg
1.66 x 10
-31
kg
1.66 x 10
-34
kg
1.66 x 10
-19
kg
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Question # 5
Unit of decay constant
λ is:
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ms
m
-1
m
S
-1
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Question # 6
Energy released by conversion of 1 amu is
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200 MeV
931 MeV
233 MeV
243 MeV
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Question # 7
The radioactive decay obeys the law
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Question # 8
The dead time of G.M tube is.
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10
-1
sec
10
-6
sec
10
-4
sec
10
-8
sec
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Question # 9
In Wilson cloud chamber, ß-particles leave
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Thin and continuous tracks
Thick and continuous tracks
No tracks
Thin and discontinuous tracks
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Question # 10
The mass of beta particle is equal to mass of.
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Protons
Electrons
Neutrons
Boron
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Question # 11
Which is true for both alpha particle and gama rays.
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They cause ionization in air
They can be deflected by electric field
They can be deflected by magnetic field
The y can penetrate a few millimeters of aluminium
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Question # 12
How many times, the alpha particle is more massive than electrons.
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6332
7332
8332
9332
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Question # 13
The mass spectrum of naturally occurring neon, showing
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1 isotope
2 isotope
3 isotope
4 isotope
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Question # 14
Curie is unit of.
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Conductivity
Binding energy
Radioactivity
Resistivity
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Question # 15
Iodine -131 is used for the treatment by
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Bones
Eyes
thyroid glands
Lungs
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Question # 16
The particles equal in mass but greater than proton are.
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Mesons
Baryons
Leptons
Hadrons
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Question # 17
The mass of protons is:
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1.675 x 10
-27
kg
1.693 x 10
-27
kg
1.673 x 10
-31
kg
1.673 x 10
-27
kg
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