Two concentric spheres of radius 20 cm & 40 cm are arranged as shown is figure. Potential difference between spheres is:
A hollow metal sphere of radius 10 cm is charged such that the potential on its surface is 80 volt. The potential at the centre of the sphere is
An inductor L=1100π, a capacitor C=1500π F and a resistance, R = 3Ω is connected in series with an AC voltage source as shown in the figure. The voltage of the AC source is given as V = 10 cos(100πt) volt. The potential difference between A and B is