Practicing Success

Target Exam

CUET

Subject

Physics

Chapter

Nuclei

Question:

In a radioactive decay, the number of nuclei undergoing decay per unit time is proportional to the total number of nuclei in the sample. Which of the following describes it best?

Options:

\(\Delta \) N / N ∝ \(\Delta \) T

\(\Delta \) N  \(\Delta \) T/ ∝ N

 \(\Delta \) T N ∝ \(\Delta \) N 

None of these

Correct Answer:

\(\Delta \) N / N ∝ \(\Delta \) T

Explanation:

In a radioactive decay, the number of nuclei undergoing decay per unit time is proportional to the total number of nuclei in the sample. This is given by : 

\(\Delta \) N / \(\Delta \) T ∝ N 

Or $ \frac{\Delta N}{N} \propto \Delta T$