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Two similar conducting balls having char...

Two similar conducting balls having charges + q and - q are placed at a separation d from each other in air. The radius of each ball is r and the separation between their centres is d (d `gt gt ` r ). Calculate the capacitance of the two ball system

A

`4 pi epsilon_(0)`r

B

2`pi epsilon_(0)` r

C

`4 pi "log"_(e ) (epsilon_(0)r)/(d)`

D

`4 pi "log"_(e ) (r )/(d)`

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The correct Answer is:
B
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