Electric charges +10μC,+5μC, and +8μC are placed at the corners of a square of side √2m. The potential at the centre of the square is
Two positive charges q and q are placed at the diagonally opposite corners of a square and two negative charges −q and −q are placed at the other two corners of the square. Then at the centre of the square the resultant electric intensity E and the net electric potential V are