Four equal point harges each `16 mu C` are placed on the four corners of a square of side 0.2 m. Calculate the force on any one of the charges.

Four point charges of +1muc each are placed on the four corners of a square of side 1 m. Calculate the electric potential at the centre of the square.

Four masses, each equal to M are placed at the four corners of a square of side a. Calculate the force of attraction on another mass m, kept at the centre of the square.

Four point charges are placed at the corners of a square of side l. Calculate potential at the centre of square.

Four point masses of 10 kg each are placed at the corners of a square PQRS of side 3 cm. Calculate the moment of inertia of the square about an axis coinciding with the side PQ of the square.

Charge of 5 mu C each are placed at the corners of an equilateral triangle of side 10 cm. Then the force on each charge is :-

Four identical point charges q are placed at four corners of a square of side a. Find the potential energy of the charge system. .