19 There are two radioactive substances A and B Decay constant of B is two times that of A Initially both have equal number of

Question

19 There are two radioactive substances A and B Decay constant of B is two times that of A Initially both have equal number of nuclei After n half lives of A rate of disintegration of both are equal The value of n is a 1 c 4 b 2 d All of these

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