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

Options

A. `(sigma)/(epsilon_(0))(a_(1))/(a_(2))`
B. `(sigma)/(epsilon_(0))(a_(2))/(a_(1))`
C. `(sigma)/(epsilon_(0))(a_(1)-a_(2))`
D. `(sigma)/(epsilon_(0))(a_(1)+a_(2))`

Answer

4