The half life period of a radioactive substance is best determined by counting the number of alpha particles emitted per second in a Geiger Muller counter from its known quantity. If the half life period of a radioactive substance is one month, then
A. $${\frac{3}{4}^{th}}$$ of it will disintegrate in two months
B. it will completely disintegrate in two months
C. it will completely disintegrate in four months
D. $${\frac{1}{8}^{th}}$$ of it will remain intact at the end of four months
Answer: Option A
This Question Belongs to Metallurgical Engineering >> Metallurgy Of Nuclear Metals
An ideal coolant for a nuclear reactor should be
A. a good absorber of neutrons
B. capable of attaining high temperature, only when it is pressurised
C. of high density, but of low heat transfer coefficient
D. free from radiation damage & non-corrosive
Decay product of tritium which is a Beta emitter is
A. hydrogen
B. helium
C. deuterium
D. none of these
The function of moderators in nuclear reactor is to
A. slow down the secondary neutrons
B. absorb the secondary neutrons
C. control the chain reaction
D. none of these
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