HERE IS THE COLOUMB'S LAW
Coulomb's law or Coulomb's inverse-square law is a law of physics describing the electrostatic interaction between electrically charged particles. It was first published in 1785 by French physicist Charles Augustin de Coulomb and was essential to the development of the theory of electromagnetism.
This law states that "The force of attraction or repulsion between two
point charges is directly proportional to the product of magnitude of
each charge and inversely proportional to the square of distance between them". Coulomb's law has been tested heavily and all observations are consistent with the law.
In 1785, the French physicist Charles Augustin de Coulomb
published his first three reports of electricity and magnetism where he
stated his law and this publication was essential to the development of
the theory of electromagnetism.He used a torsion balance
to study the repulsion and attraction forces of charged particles and
determined that the magnitude of the electric force between two point
charges is directly proportional to the product of the charges and
inversely proportional to the square of the distance between them.
as their are many scientist passed and are alive have shown their laws and their theories in every field.columb has also maked columbs law which has been accepted uptil now and can not be challenged.In 1769, Scottish physicist John Robison
announced that according to his measurements, the force of repulsion
between two spheres with charges of the same sign varied as x-2.06.