Coulomb’s law states that Force exerted between two point charges:
- Is inversely proportional to square of the distance between these charges and
- Is directly proportional to product of magnitude of the two charges
- Acts along the line joining the two point charges
F = k [q1q2] / r2 where k = 1/4π€0 (€0 = 8.854 * 10-12 C2N-1m-2 nis called permittivity of free space)