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Two radioactive substances A and B have ...

Two radioactive substances A and B have decay constants `5lambda` and `lambda` respectively. At t=0 , they have the same number of nuclei. The ratio of number of nuclei of A of those of B will be `(1//e)^2` after a time interval

A

`1/(4 lambda)`

B

`4 lambda`

C

`2 lambda`

D

`1/ (2 lambda)`

Text Solution

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The correct Answer is:
D
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