A regular hexagon of side 10 cm has a charge `5muC` 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 potential on its surface is 10V. What is the potential at the center of the sphere?

At each of the four vertices of a square of side 10 cm, four positive charges each of 20 esu are placed. Find the potential at the point of intersection of the two diagonals.

A metal wire is bent into a circle of radius 10 cm. It is given a charge of 200muC , which spreads on it uniformly. Calculate the electric potential at its centre.

Four particles each having a charge q are placed on the four vertices of a regular pentagon. The distance of each corner from the centre is a. Find the electric field at the centre of the pentagon.

Four equal charges of value +Q are placed at any four vertices of a regular hexagon of side a. By suitably choosing the vertices, what can be the maximum possible magnitude of electric field at the centre of the hexagon? (A) (Q)/(4piin_(0)a^(2)) (B) (sqrt2Q)/(4piin_(0)a^(2)) (C) (sqrt3Q)/(4piin_(0)a^(2)) (D) (2Q)/(4piin_(0)a^(2))

At each of the four vertices of a square of side 10 cm there is a +20 esu of charge. Find the Intensity of electric fleld at the point of Intersection of the two dlagonals.