Two point charges each of magnitude +q are placed at a distance r from each other. Draw the lines of force in this case.

Two point charges e_(1) and e_(2) are placed at a distance d from each other. In between them there is no point where electric field is zero. From this what conclusion can you draw ?

Statement I : A system of three positive charges, each having a charge q and placed at equal distance from each other along a straight line cannot be in equilibrium. Statement II : The charge in the middle experiences zero net force, but the force acting on the charges at the extreme ends is not zero.

Two charges +q and -q are placed at a distance d form each other . At which points the direction of the resultant electric field is parallel to the line joining the two charges ?

Two point electric charges of values q and 2q are kept at a distance d apart from each other in air. A third charge Q is to be kept along the same line in such a way that the net force acting on q and 2q is zero. Calculate the position of charge Q in terms of q and d.

Two point charges +q and -q are placed d distance apart. What is the zero potential plane for them?

Two identical thin rings, each of the radius R are coaxially placed at a distance R from each other. If Q_(1) and Q_(2) are the charges uniformly distributed on the rings, then calculate the work done in moving a charge q from the centre of one ring to the centre of the other.

Two (-ve) charge, each of magnitude q are situated at 2r distance apart. A (+ve) charge q is lying at the centre between them. The potential energy of the system is U_1 If the two nearest charges are mutually interchanged and the potential energy becomes U_2 then U_1/U_2 will be

Two negative point charges each of magnitude 2 esu and another point charge q are lying on a straight line. Each of the charges are in equilibrium. Determine the position, value and the nature of the charge q.

A particle of mass M and charge q is at rest at the midpoint between two other fixed similar charges each of magnitude Q placed a distance 2d apart. The system is collinear as shown in the figure. The particle is now displaced by a small amount x(x lt lt d) along the line joining the two charges and is left to itself. It will now oscillate about the mean position with a time period ( epsi_(0) = permittivity of free space)

Two point charges separated by a distance d apart each other with a repulsion force 9.N. if the separation between becomes 3d, the force of repulsion will be -