Principle of electrostatic induction is used in
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The answer is photocopier.
Principle of electrostatic induction is used in photocopier. Copies are produced by a photocopier using electrostatic charge. When the original is placed on a glass sheet, its image is formed on a drum with a positive charge and has a coating that has electricity conduction properties when there is light on it. So, when the lit up image comes in contact with the drum, that part of the drum loses its electrostatic charge. As the black powder on the toner is negatively charged, it gets attracted to the parts of the drum with positive charge. The drum rolls on top of the copier paper and the toner in the drum moves from the drum to the paper. This causes a black and white representation of the original document. When the paper gets heated, the toner sticks on to it and fixes the image.
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