Physics · 2020
JEE Main · 7 January 2020, Shift 2 · Q19
The activity of a radioactive sample falls from 700 s^-1 to 500 s^-1 in 30 minutes. Its half life is close to:
The activity of a radioactive sample falls from $\displaystyle 700 \mathrm{~s}^{-1}$ to $\displaystyle 500 \mathrm{~s}^{-1}$ in $\displaystyle 30$ minutes. Its half life is close to :
Official answer
(2)
$\displaystyle 62$ min
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JEE Main 2020 Physics question, with the answer from NTA’s final answer key. Where our answers come from.