CUET Preparation Today
Two radioactive elements $E_1$ and $E_2$ with their half lives $T_1$ and $T_2$ have undecayed atoms $n_1$ and $n_2$ respectively present at a given instant. What will be the ratio of their activities at this instant? |
$n_2 T_1^2: n_1 T_2^2$ $n_1 T_1: n_2 T_2$ $n_1 T_2: n_2 T_1$ $n_2 T_2^2: n_1 T_1^2$ |
$n_1 T_2: n_2 T_1$ |
The correct answer is Option (3) → $n_1 T_2: n_2 T_1$ |
