Electrostatics is the study of the forces between charged objects. The statics part of the name means the charges are not moving.

The examples collected here are the classic electrostatic configurations. Point charges, two examples of a line of charge, and a plane of charge. With just these simple geometries you will build up a good intuition about electric force.

Charge

Electric force and Coulomb’s Law

Inverse square law — The Fable of the Butter Gun

Three point charges

Line of charge — test charge off the end

Electric field

Line of charge — test charge to the side

Plane of charge

Electric potential and voltage