Electrostatics ...

Under the influence of the coulomb field of charge + Q, a charge –q is moving around it in an elliptical orbit. Find out the correct statements(s).

A charge of 1 µC is divided into two parts such that their charges are in the ratio of 2 : 3. These two charges are kept at a distance 1 m apart in vacuum. Then, the electric force between them (in N) is

A solid spherical conductor of radius R has a spherical cavity of radius a (a < R) at its centre. A charge + Q is kept at the centre. The charge at the inner surface, outer surface and at a position r (a < r < R) are respectively

Two identical metal spheres charged with + 12μF and –8µF are kept at certain distance in air. They are brought into contact and then kept at the same distance. The ratio of the magnitudes of electrostatic forces between them before and after contact is

The force of interaction between two charges q₁ = 6 μC and q₂ = 2 μC is 12 N. If charge q = – 2 μC is added to each of the charges, then the new force of interaction is

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

A comb runs through one's dry hair attracts small bits of paper. This is due to

Consider a neutral conducting sphere. A positive point charge is placed outside the sphere. The net charge on the sphere is then