Coulomb force

Electric field

An electric field is a vector field that associates to each point in space the Coulomb force experienced by a unit test charge. The strength and direction of the Coulomb force ${\textstyle \mathbf {F} }$ on a charge ${\textstyle q_{t}}$ depends on the electric field ${\textstyle \mathbf {E} }$ established by other charges that it finds itself in, such that ${\textstyle \mathbf {F} =q_{t}\mathbf {E} }$. In the simplest case, the field is considered to be generated solely by a single source point charge. More generally, the field can be generated by a distribution of charges who contribute to the overall by the principle of superposition.