Target Exam

CUET

Subject

Physics

Chapter

Nuclei

Question:

A sample of radioactive nuclei has a half life of 5.5 years. The fraction of sample remaining undecayed after 22 years is

Options:

12.5%

25%

93.75%

6.25%

Correct Answer:

6.25%

Explanation:

The correct answer is Option (4) → 6.25%