Two identical stationary charges of magnitude Q are placed at a distance of 2d from each other. The midpoint between...

Two idential point charges Q are kept at a distance r from each other. A third point charge is placed on the line joing the above two charges such that all the three charges are in equilibrium. The third charge (a) should be of magnitude q=……….. (b) should be of sign ....... (c ) should be placed ........ .

Two pith balls having charge 3_(q) and 2_(q) are placed at distance of a from each other. For what value of charge transferred from 1 ^(st) ball to 2^(nd) ball, force between balls becomes maximum?

Two points charges q_1 and q_2 are placed at a distance of 50 m from each each other in air, and interact with a certain force. The same charges are now put in oil whose relative permittivity is 5. If the interacting force between them is still the same, their separation now is

Two charges of values 2 muC and -50 muC are placed at a distance of 6 cm from each other. The distance of the point (in cm) from the bigger charge where the electric intensity will be zero is :

Two unlike charges of magnitude q are separated by a distance 2d . The potential at a point midway between them is

A total charge Q is broken in two parts Q_(1) and Q_(2) and they are placed at a distance R from each other. The maximum force of repulsion between them will occur, when

Two charges of equal magnitude q are placed at a distance 2a Another charge q of mass m, is placed midway between the two charges on X-axis. If this charges is displaced from equilibruim state to a distance x(x lt lt a) , then the particle :-

Two charged particles are placed at a distance r from each other. The magnitude of the electric force between the two charged particles is F. What will be the effect on F on placing the given charged particles in water? (Take dielectric constant of water 80).

Two charges of equal magnitude q are placed in air at a distance 2a apart and third charge -2q is placed at mid-point . The potential energy of the system is (epsi_(0) = permittivity of free space)