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Static Electricity > Uses of Static Electricity - Pg. 43

Uses of Static Electricity Now i'll explain some uses of static electricity! Uses? One simple appliance that uses coulomb's force is an air purifier. Static electricity is also used in a copy machine. By positively charging the parts you want to print and negatively charging the ink, the machine can print copies just the way you want them. Ah! Of course. Fine dust is attracted to the filter according to coulomb's force. Since things with the same charge repel each other, the negatively charged areas do not print, while positive areas attract the negatively charged ink. Static Electricity 43