Photocopiers and laser printers, defibrillators, electrostatic dust precipitators and paint sprayers are all practical applications of static electricity. This may happen safely by connecting them to the earth with a conductor. There are two kinds of charge: positive (+) and negative (-). Electrical fields cause forces to act on charged particles. Ink jet printers use static electricity to guide a tiny jet of ink to the correct place on the page. The drum has a coating that conducts electricity when light falls on it. Coloured ink is passed through a very small hole called a nozzle which separates the ink into many tiny droplets. Uses and dangers of static electricity Conductors allow an electric charge to pass through them, but insulators do not. Objects can be positively charged, negatively charged or neutral. Laser printers work in a similar way. To clean small particles from smoke before it leaves an industrial chimney, a machine called an electrostatic precipitator will use static electricity to attract the particles. How photocopy machine works, using static electricity. Steps are as follows: Original document placed on photocopier; Light goes through; Image of it is projected onto a positively charged plate/surface; Where the light touches the plate, the electrical charge is gone (poof.) Share. Objects can be positively charged, negatively charged or neutral. This may happen safely by connecting them to the earth with a conductor. Share through email; Share through twitter; Share through linkedin; Share through facebook; Share through pinterest; File previews. It involves using electrically-charged particles to attract and then deposit toner particles onto a piece of paper. Electrical fields cause forces to act on charged particles. Tap to unmute. When a photocopier is started a high voltage wire distributes a positive charge evenly on the surface of the belt or drum. How does a Photocopier work? Home Economics: Food and Nutrition (CCEA). The way this selectivity is accomplished in a copier is with The. Much more light reflects off the white areas (where there is no ink) than off the black, inked areas. 9 years ago. Copy link. Subject: Physics. To avoid this, the smoke is removed from waste gases before they pass out of the chimneys. A photocopier works on two fundamental principles: the fact that opposite charges attract and the tendency of certain materials to become more electrically conductive after absorbing electromagnetic radiation, such as UV, infrared, visible light etc. A science teachers's shop. The coating on the drum can conduct electricity when light hits it. Share. • LIGHTis reflected off of the image to be copied onto a SELENIUMcoated DRUM, giving the DRUMa POSITIVE charge wherever the LIGHTHITS. An image is transferred as charge to a rotating drum. The flow chart outlines how an electrostatic precipitator works. To avoid this, the smoke is removed from waste gases before they pass out of the chimneys. An inkjet printer uses electrostatic charge to direct the tiny ink droplets to the correct place on the page. You're signed out. 4.266666666666667 22 reviews. Insecticide sprays from aircraft can be electrostatically charged so that they cover a large area. GRAHAM. They are also attracted to the earth, so will fall quickly and are less likely to blow away. Here are some examples from industry and everyday life. If they then reach out to touch a door handle or another person, there is a spark and they feel a small shock. Conductors allow an electric charge to pass through them, but insulators do not. The Functionality of a Photocopier Static electricity is an electrical charge that is typically caused by friction and can be generated on demand. All charged objects can be discharged by being. The reflected light strikes the positively charged photoconductive material on the … How do Photocopiers work with respect to static electricity? Uses of Static Electricity… 2. Photo: Look, no hands! The droplets of insecticide are all given the same static charge as they leave the aircraft. As you rub the balloon, electrons (the tiny negatively charged particles inside atoms that carry electricity) move from your pullover onto the balloon. New GCSE BBC Bitesize - Static Electricity. To make a new copy, the paper that you are copying is placed downwards onto a sheet of glass. Not only the educational institutions and other offices but also general people use this machine to photocopy any kind of necessary papers and documents. Sample exam questions - static electricity - Edexcel, Home Economics: Food and Nutrition (CCEA). 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