JEE PHYSICS MCQ: NUCLEI

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Application +4 | -1

The nuclei of two radioactive isotopes of same substance

\mathrm{A}^{236}

and

\mathrm{A}^{234}

are present in the ratio

4: 1

in an ore obtained from Mars. Their half lives are

30 \mathrm{~min}

and

60 \mathrm{~min}

respectively. Both isotopes are alpha emitters and the activity of the isotope with half life 30

\mathrm{min}

is one Rutherford. Calculate after how much time (in min) their activities will become identical.

View answer and explanation

Correct option: A

180

Option A (180) is correct because it is the time when the activities of both isotopes will be equal, calculated using their half-lives and initial ratio.

JEE PHYSICS MCQ: NUCLEI

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