JEE PHYSICS MCQ: NUCLEI

1 Medium

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Application +4 | -1

The half life of a radioactive substance is

\mathrm{T}

. The time taken, for disintegrating

\frac{7}{8}

th part of its original mass will be:

View answer and explanation

Correct option: B

3 T

Option B (

3T

) is correct because after 3 half-lives,

\frac{7}{8}

of the original mass will have disintegrated, leaving

\frac{1}{8}

remaining.

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