Two concentric sphere of radii `a_(1)` and `a_(2)` carry chages `q_(1)` and `q_(2)` respectively.If the surface charge density `(sigma)` is same for both spheres,the electric potential at the common centre will be

Two conducting spheres of radii r_(1) and r_(2) having charges Q_(1) and Q_(2) respectively are connected to each other. There is

A charge Q has been divided on two concentirc conducting spheres of radii R_(1) and R_(2) (R_(1) gt R_(2)) such that the surface charge densities on both the sphere is same. Find the potential at their common center.

Two concentric spheres of raddi R and r have positive charges q_(1) and q_(2) with equal surface charge densities. What is the electric potential at their common centre?

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