MHT CET 2022 Physics question

The half life of a radioactive substance is 25 minutes. The time taken between 50% decay and 87.5% decay of the substance will be

(A)75 min
(B)25 min
(C)37.5 min
(D)50 minCorrect

Answer: (D)

Solution

50% decay means 50% of the substance remains, i.e. one half-life has elapsed: min. 87.5% decay means 12.5% remains, so three half-lives have elapsed: min. Time between the

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Question ID VK-094207