Coulomb’s Law Apparatus

This low cost apparatus, by way of direct measurement, facilitates the verification of Coulomb’s Inverse Square Law, which governs the electrostatic influence exerted on one another by two charged spheres. This fully assembled and self-contained apparatus comprises an enclosure with interl mirror and scale mounted on stable base, pith balls and thread, plastic covers, and plastic charging strip. Just charge the spheres and set them up. With one charged sphere from the top of a box, when the other is brought near it from the bottom, the hanging sphere experiences an electrostatic force due to charge on both and deflects away. By precisely measuring the deflection with a ruler, this electrostatic force can be estimated. A clear front screen and plastic top protect the experiment from drafts.