If the force between two charges when placed in medium of air and then in oil is 25N and 5N respectively , then the dielectric constant of oil is

The ratio of the forces between two charges placed at a certain distance apart in air at half of the distance apart in medium of dielectric .k. is

Force between two charges when placed in free space is 10N. If they are in a medium of relative permittivity 5, the force between them will be

A parallel plate condenser has a capacitance 50 muF in air and 110 muF when immersed in an oil. The dielectric constant k of the oil is

The force between two charges separated by a distance 1m is 1.8N. The charges are in the ratio 1: 2 then the charges are

The force between two electrons when placed in air is equal to 0.5 times the weight of an electron. Find the distance between two electrons (mass of electron = 9.1 xx 10^(-31)kg )

A capacitor connected to a 10V battery collects-a-charge 40muC with air as dielectric and 100muC with oil as dielectric. The dielectric constant of oil is

Force between two identical charges placed at a distance of r in vacuum is F .Now a slab of dielectric constant 4 is inserted between these two charges . If the thickness of the slab is r//2 , then the force between the charges will becomes

What is the force between two small charged of 2 xx 10^(-7) C placed 30 cm apart in air?

Two charges placed in air repel each other by a force of 10^(-4)N . When oil is introduced between the charges, then the force becomes 2.5 xx 10^(-5)N The dielectric constant of oil is

(A): If a conducting medium is placed between two charges, then electric force between them becomes zero. (R ): Reduction in a force due to introduced material is inversely proportional to its dielectric constant.