Two free point charges each of +4q and +q are placed at a distance a apart. Where should a third point charge Q be placed between them so that the entire system is in equilibrium?

Two fixed point charge 4Q and 2Q are separated by a distance x. where should a third point charge q be placed for ti to be in equilibrium?

Two charges each of +Q units are placed along a line. A third charge - q I placed between them. At what position and for what value of q, will the system be in equilibrium?

Two charges each of +q units are placed along a line. A third chare of -q/4 is placed midway between them. The system will

Two charges q and -3q are placed fixed on X-axis separated by distance 'd'. Where should a thrd charge 2q be placed such that it will not experience any force?

Two point charges +5muC and -5muc are placed at a distance 5 cm apart. Draw the equipotential surfaces of the system.

Two point charge +q and -q are separated by a distance d. Where besides at infinity is the electric potential zero?

Two point charges of - 16 muC and + 80 muC are placed 8 cm apart. Find the position of the point, where electric field is zero.

Two point charges of + 20 muC and - 80 muC are placed 18 cm apart. Find the position of the point where electric field is zero

Two identical point charges of charge Q are kept at a distance r from each other. A third point charge is placed on the line joining the above two charges, such that all the three charges are in equilibrium. Calculate the magnitude and location of the thrid charge.