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Chapter 21 - Nuclear Physics - 8
1.
In air
g
-rays intensity falls off as the inverse square of the distance from the source
a) False
b) True
2.
a
-particle can produce fluorescence on striking some substances like Zinc Sulphide etc
a) False
b) True
3.
The speed of
g
-rays is equal to 3x10
8
m/sec.
a) True
b) False
4.
Wilson could chamber is used to show the visible path of an ionizing particle.
a) True
b) False
5.
The discharge in the G.M tube is the result of ionization produced by the incident radiation.
a) False
b) True
6.
The quenching gas must have an ionization potential lower than that of inert gas.
a) False
b) True
7.
The building blocks of nucleons are called ‘Quarks’.
a) True
b) False
8.
The life span of breader reactor is 100times more than the ordinary fission reactor.
a) True
b) False
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