NEET Physics Nuclei Questions Solved


The activity of a radioactive sample is 1.6 curie and its half-life is 2.5 days. Its activity after 10 days will be

(a) 0.8 curie       (b) 0.4 curie
(c) 0.1 curie       (d) 0.16 curie

(c) Number of half lives n=102.5=4

AA0=NN0=12nA=1.6×124=0.1 curie

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