Physics · 2022
JEE Main · 27 July 2022, Shift 2 · Q48
The activity of a radioactive material is 6.4 × 10^-4 curie. Its half life is 5 days. The activity will become 5 × 10^-6 curie after:
The activity of a radioactive material is $\displaystyle 6.4 \times 10^{-4}$ curie. Its half life is $\displaystyle 5$ days. The activity will become $\displaystyle 5 \times 10^{-6}$ curie after :
Official answer
(4)
$\displaystyle 35$ days
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JEE Main 2022 Physics question, with the answer from NTA’s final answer key. Where our answers come from.