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Chapter 17 - Atomic and Nuclear Physics - 2
1.
According to the chain reaction taking place inside the sun nearly 25.7 Mev of energy is released.
a) False
b) True
2.
The sum of nucleons present inside a nucleus is called charge number.
a) True
b) False
3.
The cells of human body are destroyed due to the ionization property of the radiation
a) False
b) True
4.
The part suffering from cancer absorb less quantity of radio isotopes.
a) False
b) True
5.
An atom is a ________ particle.
a) None of the above
b) Neutral
c) Negative
d) Positive
6.
Henry Bequerel discovered radioactivity by using ______ salt.
a) Lead
b) Uranium
c) Radium
d) Copper
7.
In the experiment radioactivity, the photographic plate carried black spots at _____ diffrent points.
a) 2
b) 4
c) 3
d) 1
8.
Alpha rays produce fluorescence in
a) Zinc chloride
b) Zinc sulphide
c) Barium sulphide
d) Barium platinocydine
9.
The distance travelled by alpha rays emitted by Uranium is
a) 8.62 cm
b) 3.7 cm
c) 2.7 cm
d) 4.6 cm
10.
Alpha particles carry a charge of
a) Single negative
b) Double negative
c) Double positive
d) Single positive
11.
Alpha particles are infact the nuclei of
a) Carbon
b) Lithium
c) Helium
d) Hydrogen
12.
In order to study the nature of radiation emitted due to radioactivity, experiment was performed by
a) Rutherford
b) Charles Coulumb
c) Alexandro volta
d) Micheal Farad
13.
The rays which are not affected by electric and magnetic field are
a) All are correct
b) Gamma
c) Beta
d) Alpha
14.
Gamma rays can easily pass through sheet of iron, whose thickness is
a) 60 cm
b) 13 cm
c) 3 cm
d) 30 cm
15.
Einstein's mass energy equation is
a) E=m
2
c
b) E=mc
2
c) E=mc
d) E=m
2
c
2
16.
The energy produced from 20 kg of carbon if it is completely changed into energy is
a) 1.8 *10
8
J
b) 18 *10
8
J
c) 18 *10
18
J
d) 1.8 *10
18
J
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