A charge Q has been divided on two concentric conducting spheres of radii `R_(1)` and `R_(2)(R_(1) gt R_(1))` such that the surface charge densities on both the spheres are equal. The potential at their common centre is

Options

A. `(1)/(4pi epsilon_(0))(Q(R_(1)^(2) + R_(2)^(2)))/((R_(1) + R_(2)))`
B. `(1)/(4pi epsilon_(0))(Q(R_(1) + R_(2)))/((R_(1)^(2) + R_(2)^(2)))`
C. `(1)/(4pi epsilon_(0))(QR_(1) R_(2))/((R_(1) + R_(2)))`
D. `(1)/(4pi epsilon_(0))(Q(R_(1) R_(2)))/(R_(1) R_(2))`

Answer

B