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← JEE Main 2022 · 28 Jul · Shift 2
PhysicsSingle correct+4 / -1Question 18 of 90

JEE Main 2022 · 28 Jul · Shift 2, Physics question 18

A radioactive sample decays 78\dfrac78 times its original quantity in 15 minutes. The half-life of the sample is

Choose one option
Answer and worked solution

Official answer: A

18\frac18 left is three half lives in 15 min: 5 min.

(A)

Topics:Radioactive decay
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