Coulomb's law apparatus

An electrostatics demonstration device consisting of 7 components: a base, a transparent cylinder with a scale, an elastic metal suspension wire, a balanced rotary rocker arm, a chargeable stationary ball on a rod, a suspension adjustment unit and a damping system. Designed for 4 demonstrations: Coulomb's law using a torsion balance, the attraction of an uncharged conducting ball to a charged body, the repulsion of similarly charged balls after contact and the dependence of the interaction force on the amount of charge based on the angle of twist of the thread. Reproduces the classical scheme of Coulomb's experiment in an educational format.