1.

Two radioactive material A_(1) and A_(2) and decay constant of 10lambda_(0) and lambda_(0). If initially they have same number of nuclei, then after time (1)/(9lambda_(0)) the ratio of number of their undercayed nuclei will be:

Answer»

`(1)/(E)`
`(1)/(e^(2))`
`(1)/(e^(3))`
`(SQRT3)/(1)`

Answer :A


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