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Two concentric spheres kept in air have ...

Two concentric spheres kept in air have radii R and r. They have similar charge and equal surface charge density `sigma`. The electrical potential at their common centre is (where, `epsi_(0) =` permittivity of free space)

A

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

B

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

C

`(sigma(R+r))/(2epsilon_(0))`

D

`(sigma(R+r))/(4epsilon_(0))`

Text Solution

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The correct Answer is:
A
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