The Uses of Static Electricity - GCSE Physics | kayscience.com

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In a laser printer, positively charged powdered ink is attracted to the negatively charged areas on the drum as it rolls over the paper. In a chimney filter, smoke particles pass through a negatively charged grid and gain electrons, becoming negatively charged, and are attracted to the positively charged grids. On an electrostatic sprayer, the electrodes on the spray nozzle charge the spray droplets as they pass. The same charged droplets repel each other, helping them spread out.

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