9 5 Applications of Static Electricity P 288
- Slides: 9
9. 5 Applications of Static Electricity P 288 - 291
Applications of Static Electricity • Lightning • Laser Printers - Ink jet printers use static electricity to guide a tiny jet of ink to the correct place on the page. Laser printers work in a similar way. • Fabiric Softener Sheets and Static cling • Pollution control; Electrostatic Precipitators- by applying a static charge to dirt particles in the air and then collecting those charged particles on a
Lightning • p 288
Laser Printers •
Fabric Softeners • Hot, dry environment, lots of friction • Rubbing of different fabrics causes charges. • Fabric sheets contain a chemical that is attracted to negatively charged clothes. • Coats the surface, leaving them feeling soft. • Neutralizes the negative charges, and reduces friction by coating the clothes.
Electrostatic Precipitators in Smokestacks • Smoke from stack is given an electric charge. When it passes by electrodes of the opposite charge, most of the smoke particles cling to the electrodes. • This keeps the pollution from going out into the atmosphere • Also used to remove wood dust in pulp mills
Air fresheners • Some people purchase what are called air ionizers to freshen and purify the air in their homes. They work on a similar principle as the smokestack pollution control. These devices strip electrons from smoke molecules, dust particles, and pollen in the air, just as what happens in creating static electricity. • These charged dust and smoke particles are then attracted to and stick to a plate on the device with the opposite charge. After a while, much of the pollution is drawn from the air. • Since charged particles will also stick to neutral surfaces, some of them can stick to the wall near the ionizer, making it very dirty and difficult to clean.
Painting cars • Paint given an electrical charge. • The charged paint particles are attracted to the car and stick to the body, just like a charged balloon sticks to a wall. • Once the paint dries, it sticks much better to the car and is smoother because it is evenly distributed.
Homework • Read pages 288 -289 • Answer CYU p 290, # • Chapter 9 Test: April…. .