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A point charge q is placed at a distance...

A point charge q is placed at a distance of `r` from the centre O of an uncharged spherical shell of inner radius R and outer radius 2R. The electric potential at the centre of the shell will be

A

`(q)/(4 pi epsilon_(0))((1)/(r)-(1)/(2R))`

B

`(q)/(4 pi epsilon_(0)r)`

C

`(q)/(4 pi epsilon_(0))((1)/(r)+(1)/(2R))`

D

None of these

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The correct Answer is:
A
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