Two identical point charges are kept at a distance d. A third point charge is placed on the perpendicular bisector of the two charges at a distance x. Show that the third charge will experience maximum force when `x=(d)/(2sqrt2)`.

Two point charges are separated by a certain distance. Electric field intensity is zero at a point in between the two charges. What can we conclude about the charges ?

Two equal point charges are placed on x=-a and x=+a on the x=axis. Another point charge Q is placed on the origin. IF this charge is displaced a small distance x along x-axis, then the change of potential energy approximately will be proportional to

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

A point-charge q is placed at the origin. How does the electric field due to the charge vary with distance r from the origin?

Determine the electric field at a distance r from a point charge.

Two identical charges +Q are kept at some fixed distance. A small particle P with charge q is placed midway between them. If P is given a small displacement Deltax , it will undergo simple harmonic motion if

Two charges, + q and -q are separated by a distance d. At which points will the resultant electric field intensity be directed parallel to the line joining the charges ?

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 ?

The electric potential at a certain distance from a point charge is 600V and the electric field is 200 N//C . The distance of the point charge (in metres) is:

The points on the line joining two charges +q and 3q (kept at a distance of 1.0 m) where electric potential is zero.