[" Four equal charges "Q" are placed at the four "],[" corners of a square of side 'a' each.Work done "],[" in removing a charge "-Q" from its centre to "],[" infinity is: "]

Four equal charges Q are placed at the four corners of a square of each side is 'a'. Work done in removing a charge -Q from its centre to infinity is

Four equal charges Q are placed at the four corners of a square of each side is 'a'. Work done in removing a charge -Q from its centre to infinity is

Three equal charges Q are placed at the three corners of an equilateral triangle of side length a. Work done in shifting a charge q from infinity to the centroid of the triangle is

Equal charges Q are placed at the four corners A, B, C, D of a square of length a. The magnitude of the force on the charge at B will be

Equal charges Q are placed at the four corners A, B, C, D of a square of length a. The magnitude of the force on the charge at B will be

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. .