Physics · 2021
JEE Main · 25 July 2021, Shift 2 · Q27
The nuclear activity of a radioactive element becomes (1/8)^th of its initial value in 30 years. The half-life of radioactive element is \ \ \ \…
The nuclear activity of a radioactive element becomes $\displaystyle \left(\frac{1}{8}\right)^{\text {th }}$ of its initial value in $\displaystyle 30$ years. The half-life of radioactive element is \_\_\_\_ years.
Official answer
10
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JEE Main 2021 Physics question, with the answer from NTA’s final answer key. Where our answers come from.