Draw `E-r` and `V-r` graphs due to two point charges `+ q` and `-2q` kept at some along the line joining these two charges.

Draw E-r and V-r graphs due to two charged spherical shells as shown in figure (along the line between C and prop )

Draw E-r and V-r graphs due to two charged spherical shells as shown in figure (along the line between C and prop )

Two charges each having magnitude q and same polarity are fixed some distance apart.A point charge Q is kept on exactly middle of the line joining the two charges.Then equilibrium of Q is

Two charges +q and-q are kept apart, Then at any point on the right bisector of line joining the two charges

Two identical charges +Q are kept fixed some distance apart.A small particles P with charge q is placed midway between them . If P is given a small displacement Delta ,it will undergo simple harmonic motion if (i) q is positive and Delta is along the line joining the charges (ii) q is positive and Delta is perpendicular to the line joining the charges (iii) q is negative and Delta is perpendicular to the line joining the charges (iv) q is positive and Delta is along the line joining the charges

Two charge +q and -q are kept apart.then at any point on the right beisector of line joining the two charges

Draw E and V versus r on the same graph for a point charge.

Draw E and V versus r on the same graph for a point charge.

If Two charges +q and +4q are separated by a distance d and a point charge Q is placed on the line joining the above two charges and in between them such that all charges are in equilibrium. Then the charge Q and it's position are