Three charges each of value q are placed the corers of an equilaterla triangle. A fourth charge Q is placed at the centre of the triangle.
If Q = -q, will the charges at the corners move towards the centre or fly away from it?

Three charges each of value q are placed the corners of an equilaterla triangle. A fourth charge Q is placed at the centre of the triangle. For what value of Q, will the charges remain stationary? In this situation, how much work is done in removing the charges to infinity?

Three equal charges of +q C each placed at the three corners of an equilateral triangle. Find the total force experienced by a unit charge placed at the centroid of the triangle.

Three charges, each equal to q, are placed at the three corners of a square of side a. Find the electric field at the fourth corner of the square.

A charge Q is placed at the corner of a cube. The electric flux through all the six faces of the cube is

Two charges each of +q units are placed along a line. A third chare of -q/4 is placed midway between them. The system will

A positive charge Q is uniformly distributed along a circular ring of radius R. A small test charge q is placed at the centre of the ring.

Three particles each of mass m are placed at the corners of a right angled triangle as shown in figure if OA=a and OB=b, the position vector of the centre of mass is: .

Three points charges +q,+2q and Q are placed at the three vertices of an equilateral triangle. Find the value of charge Q (in terms of q), so that electric otential energy of the system is zero.

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?