A point charge Q is placed at the corner of a square of side a. Find the flux through the square.

A point charge Q is placed at the corner of a square of side a, then find the flux through the square.

A point charge q is placed at one corner of a cube of edge a. The flux through each of the cube faces 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. .

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

Four identical charges q are placed at the corners of a square of side a. Find the potential energy of one of the charges due to the remaining charges. .

Four identical charges q are placed at the corners of a square of side a. Find the potential energy of one of the charges due to the remaining charges. .

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

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

Four identical charges i.e. q is placed at the corners of a square of side a . The charge Q that must be placed at the centre of the square such that the whole system of charges in equilibrium is