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Two spherical conductors A and B of radi...

Two spherical conductors A and B of radii a and b (`b gt a`) are placed concentrically in air. A is given charged +Q while B is earthed. Then the equivalent capacitance of the system is

A

`4piepsi_(0) (ab)/(b-a)`

B

`4piepsi_(0)(a+b)`

C

`4piepsi_(0)b`

D

`4piepsi_(0) a`

Text Solution

Verified by Experts

The correct Answer is:
C
All the charge given to inner sphere to inner sphere will pass on to the outer one. So capacitance that of outer one is `4pi in_(0) b`.
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