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A radioactive source in the form of a me...

A radioactive source in the form of a metal sphere of diameter 3.2×10^ −3 m emits β-particle at a constant rate of 6.25×10^ 10 particle/sec. The source is electrically insulated and all the β-particle are emitted from the surface. The potential of the sphere will rise to 1 V in time

A

`180 mus`

B

`90 mus`

C

`18mus`

D

`9mus`

Text Solution

Verified by Experts

The correct Answer is:
C
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