Question: For a Van de Graaff generator, assuming that an equal charge but of opposite polarity is sprayed on the down going belt, find the generator

For a Van de Graaff generator, assuming that an equal charge but of opposite polarity is sprayed on the down going belt, find the generator current if the belt is driven at a speed of 10m/s. The generator is designed for working in air at atmospheric temperature and pressure and the charge density cannot exceed 310-5 C/m2. A suitable dimension for the belt so as to keep the vibrations to a minimum is 1m

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