Description
A Van de Graff generatoris an electrostatic generator which uses a moving belt to accumulate electric charge on a
hollow metal globe on the top of an insulated column, creating very high electric potentials. It produces very high
voltage direct current (DC) electricity at low current levels. It was invented by American physicist Robert J. Van de
Graff during 1929. The potential difference achieved by modern Van de Graff generators can be as much as 5
megavolts. A tabletop version can produce on the order of 100,000 volts and can store enough energy to produce a
visible spark. Small Van de Graff machines are produced for entertainment, and for physics education to
teach electrostatics; larger ones are displayed in some science museums.
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