A Van de Graff generator supplies a constant flow of positive charges to one side of the plate. The pith ball is induced to have the same charge as the plate. This causes the pith ball to attract to the oppositely charged plate. Once pith ball hits the opposite plate, it becomes negatively charged and swings to the positive plate and the cycle continues.
(5B10.30) Parallel Plate (Franklin’s bell Variation)
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A Van de Graff generator supplies a constant flow of positive charges to one side of the plate. The pith ball is induced to have the same charge as the plate. This causes the pith ball to attract to the oppositely charged plate. Once pith ball hits the opposite plate, it becomes negatively charged and swings to the positive plate and the cycle continues.
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