A charge 'Q' is placed at each corner of a cube of side 'a'. The potential at the centre of the cube is

Four charges, each of value q, are placed at the four corners of a square of side a. What is the potential at the centre of the square

A point charge q is kept at a corner of a cube

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

Charge q is placed at each of the corners of a hexagon of side r. The potential at its centre is ________.(write the formula in the blank)

A point charge +q is placed at the centre of a cube of side L. The electric flux emerging from the cube is

A charge Q is placed at the corner of a cube. The electric flux through all the six faces of the cube is