Van de Graaff Generator
The Van de Graaff generator is a device used to produce high voltages by separation of electric charges. Electrostatic charges are produced by friction between a cylinder and a belt driven by an electric motor. Potential differences as high as megavolts can be produced.
See the Wikipedia entry "Van de Graaff Generator".
"Van de Graaff Generator"
Wolfram Demonstrations Project
Published: February 20 2009