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Van-de-Hoff's Generator working principle

A Van de Graaff generator is an electrostatic generator. American physicist, Robert J. Van de Graaff was the person behind this invention. It uses a moving belt that accumulates charge on a hollow metal structure. This structure has a design of a globe, placed on the top of a column that is insulating in nature.

Thus, it creates a very high electric potential in the order of a few million volts.  This results in a very large electric field. We use this electric field to accelerate charged particles.

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