|Coulomb's law |
A law stating that the strength of the force exerted by one point charge on another depends on the strength of the charges and on the distance between them. Since Coulomb's law is an inverse square law, higher charges entail stronger force, while greater distances entail weaker force. The force is understood as arising from the electric field that surrounds the charges. The force is repulsive if the charges have the same sign, and attractive if they have opposite sign.