Physics · 2021
JEE Main · 18 March 2021, Shift 1 · Q11
A radioactive sample disintegrates via two independent decay processes having half lives T_1 / 2^(1) and T_1 / 2^(2) respectively. The effective…
A radioactive sample disintegrates via two independent decay processes having half lives $\displaystyle \mathrm{T}_{1 / 2}^{(1)}$ and $\displaystyle \mathrm{T}_{1 / 2}^{(2)}$ respectively. The effective half-life, $\displaystyle \mathrm{T}_{1 / 2}$ of the nuclei is :
Official answer
(1)
$\displaystyle \mathrm{T}_{1 / 2}=\frac{\mathrm{T}_{1 / 2}^{(1)} \mathrm{T}_{1 / 2}^{(2)}}{\mathrm{T}_{1 / 2}^{(1)}+\mathrm{T}_{1 / 2}^{(2)}}$
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JEE Main 2021 Physics question, with the answer from NTA’s final answer key. Where our answers come from.