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A charge Q is distributed over two conce...

A charge Q is distributed over two concentric hollow spheres of radius r and `R(gtr)` such that the surface densities are equal. The potential at the common centre is

A

`(Q(R^2+r^2))/(4piepsilon_0(R+r))`

B

`Q/(R+r)`

C

zero

D

`(Q(R+r))/(4piepsilon_0(R^2+r^2))`

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