# Electrostatic ring moves ball

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/

- Kind: Short
- Year: 2014
- Runtime: 1 min
- By: DrAntonioCarlosMdeQueiroz
- Archive: [Wikimedia Commons](https://commons.wikimedia.org/wiki/File:Electrostatic_ring_moves_ball.webm)
- Licence or status: [CC BY-SA 4.0](https://creativecommons.org/licenses/by-sa/4.0) (as the archive states it)
- Credit: DrAntonioCarlosMdeQueiroz
- Who can watch: Teens profiles and older (the archive gives no rating; placed by Invisible Network from its collection and subjects)

[Watch now](https://invisiblenetwork.ai/watch/archive/commons/105392291?play=1)