Four point charges each of 10 nano coulomb are placed at the four corners of a square of side 2 m each. Find the neat potential at the centre of the square.

Charges 1mu coul each are placed at the corners of a squares of side 9 cm. Calculate the potential at the centre of the square.

Four charges each of charge (+q) are placed at the corners of square of side (0.1 meter). The net electric field intensity at the centre of the square is

Three charges each equal to 1muC are placed at the three corners of a square of side 1.0m. Find electric field at the fourth corner.

Four equal positive charges each of value Q are arranged at the four corners of a square of side a each. A body of mass m and having a unit positive charge is in equilibrium at a height h above the centre of the square. Find Q.

Four point charges each of charge -4muC are placed at the four corners of a square such that they are in equilibrium when a charge q is placed at its centre. Find q.