A radioactive sample decays 7/8 times it

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Target Exam

CUET

Subject

Physics

Chapter

Nuclei

Question:

A radioactive sample decays 7/8 times its initial quantity in 21 minutes. The half life of the sample will be

Options:

7 min

14 min

63 min

84 min

Correct Answer:

7 min

Explanation:

The correct answer is Option (1) → 7 min