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A conducting sphere of radius R is given...

A conducting sphere of radius `R` is given a charge `Q`. The electric potential and the electric field at the centre of the sphere respectively are

A

`(Q)/(4 pi epsilon_(0) R)` and zero

B

`(Q)/(4 pi epsilon_(0) R)` and `(Q)/(4 pi epsilon_(0) R^(2))`

C

both are zero

D

zero and `(Q)/(4 pi epsilon_(0) R^(2))`

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