List of top Physics Questions on Gauss Law asked in EAMCET

Two concentric hollow spherical shells have radii $ r $ and $ R \left(R\,>>\,r\right) $ . A charge $ Q $ is distributed on them such that the surface charge densities are equal. The electric potential at the centre is

The electrical potential on the surface of a sphere of radius r due to a charge $ 3\times {{10}^{-6}}C $ is 500 V. The intensity of electric field on the surface of the sphere is $ \left[ \frac{1}{4\pi {{\varepsilon }_{0}}}=9\times {{10}^{9}}N{{m}^{2}}{{C}^{-2}} \right] $ $ (in\text{ }N{{C}^{-1}}) $ :