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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' carved inside a solid conducting sphere of radius 'a'. Then total energy of the system is:
`[k = (1)/(4pi in_(0))]`

A

`(kQ^(2))/(2a)-(kQ^(2))/(2b)`

B

`(kQ^(2))/(2a)+(kQ^(2))/(2b)`

C

`(kQ^(2))/(a)+(kQ^(2))/(b)`

D

`(kQ^(2))/(a)-(kQ^(2))/(b)`

Text Solution

Verified by Experts

The correct Answer is:
A
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