Physics · 2019
JEE Main · 12 April 2019, Shift 2 · Q26
Half lives of two radioactive nuclei A and B are 10 minutes and 20 minutes, respectively. If, initially a sample has equal number of nuclei, then…
Half lives of two radioactive nuclei A and B are $\displaystyle 10$ minutes and $\displaystyle 20$ minutes, respectively. If, initially a sample has equal number of nuclei, then after $\displaystyle 60$ minutes, the ratio of decayed numbers of nuclei A and B will be :
Official answer
(2)
$\displaystyle 9$ : $\displaystyle 8$
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JEE Main 2019 Physics question, with the answer from NTA’s final answer key. Where our answers come from.