Questions
The activity of a radioactive sample is measured as 9750 counts per minute at t = 0 and as 975 counts per minute at t = 5 minutes.
The decay constant is approximately
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Correct option is B
A=A0e-λt⇒975=9750e-λx5⇒e5λ=10 ⇒5λ=loge10=2.3026 log1010=2.3026 ⇒λ=0.461Similar Questions
The half life period of a radioactive element X is same as the mean life time of another radioactive element Y. Initially both of them have the same number of atoms. Then
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