Physics · 2013
JEE Main · 22 April 2013, Shift 1 · Q18
The half - life of a radioactive element A is the same as the mean-life of another radioactive element B. Initially both substances have the same…
The half - life of a radioactive element A is the same as the mean-life of another radioactive element B. Initially both substances have the same number of atoms, then :
Official answer
(4)
$\displaystyle B$ will decay at a faster rate than $\displaystyle A$
initially
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JEE Main 2013 Physics question, with the answer from NTA’s final answer key. Where our answers come from.