JEE PHYSICS MCQ: NUCLEI

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Application +4 | -1

A sample of radioactive material decays simultaneously by two processes

A

and

B

with half-lives

\frac{1}{2}

and

\frac{1}{4}

hours respectively. For first half-hour, it decays with process

A,

next one hour with process

B

and for a further half an hour with both

A

and

B.

If originally there were

{N}_0

nuclei, find the number of nuclei after 2 hours of such decay

View answer and explanation

Correct option: A

\frac{N_0}{(2)^8}

Option A (

\frac{N_0}{(2)^8}

) is correct because it accounts for the decay during each time interval with the respective half-lives.

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