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The activity of a radioactive sample is ...

The activity of a radioactive sample is measures as `N_0` counts per minute at `t = 0` and `N_0//e` counts per minute at `t = 5 min`. The time (in minute) at which the activity reduces to half its value is.

A

`log_(e ) 2/5`

B

`5/(log_(e )2)`

C

`5 log_(10) 2`

D

`5 log_(e ) 2`

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The correct Answer is:
D
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