A regular hexagon of side 10 cm has a charge `5 mu C` at each of its vertices. Calculate the potential at the centre of the hexagon.

A hollow metal sphere of radius 5 cm is charged such that the potential on its surface is 10 V. The potential at the centre of the sphere is

A sphere of radius1 0 cm carries a charge of 1 mu C . Calculate the electric field at the surface of the sphere

One hundred twenty five small liquid drops, each carrying a charge of 0.5muC and each of diameter 0.1m form a bigger drop. Calculate the potential at the surface of the bigger drop.

A sphere of radius 10 cm carries a charge of 1 mu C . Calculate the electric field at a distance of 5 cm from the center of the sphere

Charges +200muC , -150muC , +20muC and -60muC are at the comers of a square of side 2m. Calculate electric potential at the centre of the square.

A metal wire is bent in a circle of radius 20cm. It is given a charge of 400muC which is spread on it uniformly. Calculate the electric potential at its centre.

A sphere of radius1 0 cm carries a charge of 1 mu C . Calculate the electric field at a distance of 30 cm from the center of the sphere