The mutual force of repulsion between two point charges kept a fixed distance apart is `9 xx 10^-5` N when in vacuum and `4 xx 10^-5` N when placed in a dielectric medium. What is the value of dielectric constant of the medium?

Coulomb's force between two point charges separated by certain distance in air is F. If the charges are situated in medium at same place then Coulomb's force reduces to F//4 . The dielectric constant of medium will be

The elctric force acting between two point charges kept at a certain distance invaccum is 16 N. If the same two charges are kept at the same distance in a medium of dielectric constant 8, the electric force acting between them is ________N.

The force of repulsion between two identical positive charges when kept with aseparation r in air is F. half the gap between the two charges is filled by a dielectric slab of dielectric constant = 4. thenthe new force of repulsion between those two charges becomes

The permittivity of medium is 26.55 xx10^-12 C^2//Nm^2 . The dielectric constant of the medium will be

If the speed of light in a medium is 1.5xx10^8 m//s , what is the absolute refractive index of the medium?

The Coulomb's repulsive force between two point charges placed at distance d apart, is F. If the distance is increased to 2d then the repulsive force between the charges as compared to its previous value, will become A. 1//4 the previous distance B. 1//2 C. 3//4 D. same

The permittivity of medium is 26.55 xx 10^-12 C^2//Nm^2 . The dielectric constant of medium will be

Two point charges whose magnitudes are in the ratio 3 : 2 repel each other with a force 135 xx 10^14 N when they are 4 cm apart in air. Find the magnitude of each charge.