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Radioactive material A has decay constan...

Radioactive material A has decay constant `8lambda` and material B has decay constant `lambda`.Initially,They have same number of nulei.After what time,the ratio of number of nuclei of material B to that A will be `1/e`?

A

`1/(lambda)`

B

`1/(7 lambda)`

C

`1/(8lambda)`

D

`1/(9lambda)`

Text Solution

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The correct Answer is:
B
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