Four charge `Q, q, Q` and q are kept at the four corners of a square as shown below. What is the relation between Q and q, so that the net force on a charge q is zero ?

Four charges Q-Q, Q-Q are placed at the corners of a square as shown . The potential is zero at points

Four point charges Q, q, Q and q are placed at the corners of a square of side 'a' as shown in the figure. Find the resultant electric force on a charge Q?

Four point charges Q, q, Q and q are placed at the corners of a square of side' a' as shown in the figure. Find the . (a) resultnat electric force on a charge Q and . (b) potential energy of this system.

Four point charges Q, q, Q and q are placed at the corners of a square of side' a' as shown in the figure. Find the . (a) resultnat electric force on a charge Q and . (b) potential energy of this system.

Four point charges Q.q Q and q are placed at the corners of a square side 'a' as shown in the figures. Find the resultant electric force on a charge Q,

Four point charges -Q,-q,2q and 2Q are placed , one at each corner of the square. The relation between Q and q for which the potential at the centre of the square is zero is :

Four point charges -Q, -q, 2q and 2Q are placed, one at each corner of the square. The relation between Q and q for which the potential at the centre of the square is zero is