Coulomb's law
Also known as Coulomb interaction, Coulomb force, Coulomb law
a physical law that states the electric force between two point charges is proportional to the product of the charges and inversely proportional to the square of the distance between them.
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Coulomb's law describes how electric forces work between charged objects: the force gets stronger when the charges are larger or closer together, and weaker when they're farther apart. This law is fundamental to understanding electricity and magnetism, forming the basis for how we explain electric fields and the behavior of charged particles.
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The magnitude of the electrostatic force F between two point charges q1 and q2 is directly proportional to the product of the magnitudes of charges and inversely proportional to the square of the distance between them. Like charges repel each other, and unlike charges attract each other.
Coulomb's inverse-square law, or simply Coulomb's law, is a scientific law of physics that describes the amount of force between two electrically charged particles at rest. This electric force is conventionally called the electrostatic force or Coulomb force. Although the law was known earlier, it was first published in 1785 by French physicist Charles-Augustin de Coulomb. Coulomb's law was essential to the development of the theory of electromagnetism and may even be its starting point, as it allowed meaningful discussions of the amount of electric charge in a particle.