Physics · 2020
JEE Main · 3 September 2020, Shift 1 · Q19
In a radioactive material, fraction of active material remaining after time t is 9/16. The fraction that was remaining after t / 2 is:
In a radioactive material, fraction of active material remaining after time t is $\displaystyle 9$/16. The fraction that was remaining after $\displaystyle t / 2$ is :
Official answer
(2)
$\displaystyle \frac{3}{4}$
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JEE Main 2020 Physics question, with the answer from NTA’s final answer key. Where our answers come from.