High Quality Content by WIKIPEDIA articles! 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.