Electrostatic ring moves ball

About

Light balls painted with conductive ink (China ink) move around a metal ring placed above an insulating plate, with a grounded conductive plate below. This is an adaptation of a classic demonstration about electricity found in many old texts. By Dr. Antônio Carlos M. de Queiroz (in memoriam). http://www.coe.ufrj.br/~acmq/

Archive

Wikimedia Commons, in Wikimedia Commons

Licence or status

CC BY-SA 4.0, as the Wikimedia Commons states it.

Rights statement

Creative Commons Attribution-Share Alike 4.0

Credit

DrAntonioCarlosMdeQueiroz

Who can watch

The archive gives no rating. Invisible Network shows it to Teens profiles and older, judged from its collection and subjects. How films are placed