A radioactive sample | NUCLEAR PHYSICS

JEE MAIN 2021

26.02.2021_S2

Question

A radioactive sample is undergoing $\alpha$ decay. At any time $t_1$, its activity is A and another time $t_2$, the activity is $\frac{A}{5}$. What is the average life time for the sample?

Select the correct option:

$\frac{\ln 5}{t_2-t_1}$

$\frac{t_1-t_2}{\ell n 5}$

$\frac{t_2-t_1}{\ln 5}$

$\frac{\ln \left(\mathrm{t}_2+\mathrm{t}_1\right)}{2}$

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

Solution

Question Tags

JEE Main

Physics

Easy

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