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Two radioactive substance A and B have d...

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

A

`(1)/(lambda)`

B

`(1)/(2lambda)`

C

`(2)/(lambda)`

D

`(1)/(4lambda)`

Text Solution

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The correct Answer is:
B
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