JEE Main 2021 (18 Mar, Shift 1) Physics Q11: Nuclei

Question

A radioactive sample disintegrates via two independent decay processes having half lives $T_{1/2}^{(1)}$ and $T_{1/2}^{(2)}$ respectively. The effective half-life, $T_{1/2}$ of the nuclei is :

Accepted Answer

Option 1: $T_{1/2} = \frac{T_{1/2}^{(1)}\,T_{1/2}^{(2)}}{T_{1/2}^{(1)} + T_{1/2}^{(2)}}$

Answer

$T_{1/2} = \frac{T_{1/2}^{(1)}\,T_{1/2}^{(2)}}{T_{1/2}^{(1)} + T_{1/2}^{(2)}}$

Answer

$T_{1/2} = T_{1/2}^{(1)} + T_{1/2}^{(2)}$

Answer

$T_{1/2} = \frac{T_{1/2}^{(1)} + T_{1/2}^{(2)}}{T_{1/2}^{(1)} - T_{1/2}^{(2)}}$

Answer

None of the above

JEE Main 18 March 2021, Shift 1, Physics Q11

Same idea in other shifts