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When was Van de Graff generator invented and by whom?

When was Van de Graff generator invented and by whom? Correct Answer 1933, Robert Van de Graff

Van de Graff generator was invented by Robert Jemison Van de Graff on November 28, 1933. Robert Jemison invented the Van de Graff generator, which is a kind of high-voltage electrostatic generator that accelerates particles, while he was doing his PhD in Princeton University.

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