Coulomb's Law

#2 Coulomb's Law Derivation

Coulomb’s law states that Force exerted between two point charges:

1. Is inversely proportional to square of the distance between these charges and

2. Is directly proportional to product of magnitude of the two charges

Here ε₀ = 8.854 x 10^-12 C² N^-1 m^-2is called permittivity of free space.

In Other Medium

If charges are placed in a medium other than vacuum, then

Here ε is the permittivity of the medium.

Now,

Here ε_r is the relative permittivity of the medium or dielectric constant of the medium

Coulomb's Law in vector form

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