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 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.

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

Six charges +q each are placed at the corners of a regular hexagon of each side a. The electric field at the centre of the hexagon is

Three point 10muC each are placed at the corner of an equilateral triangle of side 5 cm. Calculate the resultant electric field intensity at the centroid of the triangle.

Four point charges q_A = 2mu C , q_B = -5 mu C , q_C = 2mu C and q_D = - 5 mu C are located at the corners of a square ABCD of side 10 cm . What is the force on a charge of 1 muC placed at the centre of the square?