State Coulomb.s law

Explanation

The electrostatic force of attraction or repulsion between two stationary point charges is directly proportional to the product of the magnitude of charges and inversely proportional to the square of the distance between them. This force acts along the straight line joining the two point charges. Explanation: Consider two point charges `q_(1) and q_(2)` separated by a distance r
According to the law:

`F prop q_(1)q_(2), F prop (1)/(r^(2))`
`therefore F prop (q_(1)q_(2))/(r^(2))` or `F= k.(q_(1)q_(2))/(r^(2)) k= (1)/(4pi epsi_(0))` Where, `epsi_(0)` is called the permittivity of free space
`therefore F= (1)/(4pi epsi_(0))(q_(1)q_(2))/(r^(2))`