`+4e`and +e are two charges separated by a distance 'a' m.Where should be a third charge 'q' be placed so that it is in equilibrium?

Two fixed point charges +9e and +4e are separated by a distance x.Where should a point charge be placed between the two charges, so that it is in equilibrium?

Two fixed point charges +16 mu C and -9 mu C are placed 8 cm apart in air. Where should a third point charge be placed so that, the third charge is in equilibrium

Two metal plates X and Y of the area A are separated by a distance .d. The plates are charged +Q and -Q respectively. This arrangement is called…………………………..

Four charges each equal to -Q are placed at the four corners of a square and a charge q is at its center. If the system is in equilibrium, the value of q is :

Two equal and opposite charge +q and -q are separated by a small distance 2a. Br Name this arrangement.

Two point charges q_1 and q_2 are sepa-rated by a distance r in space:- What happens to the force between the charges:- When the distance of separation is decreased. Hence establish the law governing it.

Potential energy of a system of charges is directly proportional to the product of charges and inversely to the distance between them.Two point charges 3 x 10^(-8) C and - 2 x 10^(-8) C are separated by a distance of 15cm. At what point on the line joining the charges the potential is zero?