An equation defining the force of attraction or repulsion between two charges.

Coulomb's Law describes the interaction between two objects that have electric charges. It states that the force between two charged bodies is equal to a constant k approximately 8.99×109 N m2/C2 times the product of the two charges, all divided by the square of the distance between the bodies. If the two charges are both either positive or negative, the force will be positive and the bodies will repel each other. If one is positive and one is negative, the force will be negative and they will attract each other.

Also called the LAW OF ELECTRIC CHARGES or the LAW OF ELECTROSTATIC ATTRACTION. Coulomb's Law states that charged bodies attract or repel each other with a force that is directly proportional to the product of their individual charges and inversely proportional to the square of the distance between them.

In physics, Coulomb's law is an inverse-square law indicating the magnitude and direction of electrostatic force that one stationary, electrically charged object of small dimensions (ideally, a ) exerts on another. It is named after Charles-Augustin de Coulomb who used a torsion balance to establish it.