Ans
1
->
consider q charge to be concentrated at the centre of sphere A. hence this q point charge will give kq/3a potential at the surface of sphere c.we know that potential at the outer surface of the sphere is equal to the potential at every interior point of the sphere(also at centre).hence the expression of potential due to q charge is kq/3a
9 years ago
by
harshvardhan shukla