Coulomb's Law in Electrostatics Coulomb's law in electrostatics is the electrical analog of Newton's law of gravitation. In 1785, Coulomb measured the force of attraction or repulsion between two electrical charges by using a torsion balance. His observations are known as Coulomb's law in electrostatics. It states that two-point charges attract or repel each other with a force that is directly proportional to the product of the magnitudes of the charges and inversely proportional to the square of the distance between them. The force is repulsive if the charges are alike and attractive in case of unlike charges. Further, the electrostatic force between two charges is central in nature. It may be pointed out that Columb's law in electrostatics holds for stationary charges. Further, the two charges should be points in size. Consider that two charges q, and q2 are present at points A and B at a the distance r apart as shown in Fig. 1.03. Then, the force between the two