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Two connectric spheres of radii R and r ...

Two connectric spheres of radii `R` and `r` have similar charges with equal surface charge densities `(sigam)`. The electric potential at their common centre is

A

`sigma//epsilon_(0)`

B

`(sigma)/(epsilon_(0))(R-r)`

C

`(sigma)/(epsilon_(0))(R+r)`

D

none of the above

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The correct Answer is:
C
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