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Two radioactive materials A and B have decay constants 10  respectively. If initially they have the same number of nuclei, then the ratio of the number of nuclei, of A to that of B will be 1/e after a time :

(a)

(b)

(c)

(d)



Question ID - 51332 | SaraNextGen Top Answer

Two radioactive materials A and B have decay constants 10  respectively. If initially they have the same number of nuclei, then the ratio of the number of nuclei, of A to that of B will be 1/e after a time :

(a)

(b)

(c)

(d)

1 Answer
127 votes
Answer Key / Explanation : (c) -

Number of nuclei present at any time t

N = N0

  =

    t=

127 votes


127