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A conducting sphere of radius r carries ...

A conducting sphere of radius r carries a charge q. Total energy stored in surface is :

A

`0.25 xx q^2/(4 pi epsilon_0)`

B

`0.025 xx q^2/(pi epsilon_0r)`

C

`4pi epsilon_0q^2`

D

`2pi epsilon_0q_2r`

Text Solution

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The correct Answer is:
B
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A charge +Q is placed on a large spherical conducting shell of radius R. Another small conducitng concentric sphere of radiur r carrying charge q is placed inside the shell. Find the potential difference between two points. One lying on the sphere and the other on the shell.

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