Electrostatic forces and fields

Interactive simulation of the electric forces and electrostatic fields produced by up to four point charges. Change the values, move the charges, and compare the force and field vectors in each situation.

Each point charge produces a radial electric field given by Coulomb's Law, E = kq/r²; the total field at any point is the vector sum of the contributions from all the charges present — the superposition principle, which also determines the resultant force on each individual charge.

Marco P. M. de Souza