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A point charge 'Q' is placed at the cent...

A point charge `'Q'` is placed at the centre of a spherical cavity of radius 'b' curve inside a soild conducting sphere of radius 'a'. Then total energy of the system is : `[k=(1)/(4piepsilon_(0))]`

A

`(KQ^(2))/(2)[(1)/(a)-(1)/(b)]`

B

`(KQ^(2))/(2)[(1)/(a)+(1)/(b)]`

C

`KQ^(2)[(1)/(a)+(1)/(b)]`

D

`2KQ^(2)[(1)/(a)+(1)/(b)]`

Text Solution

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The correct Answer is:
A
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