Electric Charge...

The force between two charges when placed in free space is 5 N.If they are in a medium of relative permittivity 5, the force between them willbe

Two like charges are placed a certain distance apart in air. If a brass plate is introduced between them, the force between the two charges will

Two charges are placed a certain distance apart in air. If a glass slab is introduced between them, the force between them will

Two charges of 10 C and -15 C are separated in air by 1m.The ratio of force exerted by one on the other is

Calculate the excess number of electrons on each of two similar charged spheres that are located 5 cm apart (in air),such that the force of repulsion between them is 36 x 10$$^{-19}$$N

An electrostatic force of attraction between two point charges $$A$$ and $$B$$ is$$ 1000 N$$. If the charge on $$A$$ is increased by $$25$$% and that on $$B$$ is reduced by $$25$$% and the initial distance between them is decreased by $$25$$%, the new force of attraction between them is ______$$N.$$

Two charges are placed a certain distance apart in air. If a brass plate is introduced between them, the force between them will

Two charged bodies with a distance 'd' between them are placed in water and then in the air, then the new force between them ____. (Dielectric constant of water is more than one)

Each of the two point charges are doubled and their distance is halved. Force of interaction becomes P times, where P is

Two identical spheres having charges $$8 \mu C$$ and $$-4\mu C$$ are kept at a certain distance apart. Now they are brought into contact, after that again they are kept at the same distance. Compare the forces in the two cases