Applications of Static Electricity electrostatic spray painting electrostatic precipitator

1. Applications of Static Electricity electrostatic spray painting electrostatic precipitator electrostatic duster photocopier

2. Applications of Static Electricity Conductor: an object that lets electrons move easily through it e.g. metal wire

3. Applications of Static Electricity Conductor: an object that lets electrons move easily through it e.g. metal wire Insulator: a material that does not easily allow the movement of electrons through it e.g. plastic

4. Applications of Static Electricity Grounding: connecting an object to a large body, like Earth, that is capable of removing any electric charge on the object

5. Applications of Static Electricity Grounding: connecting an object to a large body, like Earth, that is capable of removing any electric charge on the object

6. Negative object: excess electrons flow from the object to the Earth until it is neutral Positive object: electrons flow from the Earth to the object until it is neutral

7. Applications of Static Electricity Electrostatic Spray Painting: positively charge the object and negatively charge the paint particles

8. Paint coming out of the nozzle gains a negative charge through friction • The surface of the car has been given a positive charge • opposite charges attract • No loss of paint!!

9. Applications of Static Electricity Electrostatic Duster: rubbing the duster across a surface causes the duster to become charged by friction.

10. Applications of Static Electricity Electrostatic Duster:rubbing the duster across a surface causes the duster to become charged by friction. charged objects attract neutral objects neutraldust particles stick to charged duster

11. Applications of Static Electricity Electrostatic Precipitator: a device to remove dust particles from the exhaust gas from industry

12. Applications of Static Electricity Electrostatic Precipitator: a device to remove dust particles from the exhaust gas from industry

13. Applications of Static Electricity Electrostatic Precipitator: a device to remove dust particles from the exhaust gas from industry Makes use of the laws of Electrostatics Charge

14. 1. smoke particles pick up a negative charge 2. gas moves through an area with positively charged plates 3. the positive plates attracts the negative particles 4. clumps of smoke particles collect up on trays and are removed for disposal 5. collector plates are cleaned/charged periodically

15. Applications of Static Electricity Photocopying: **selenium is an insulator but becomes a conductor when exposed to light** How Photocopiers Work

16. Applications of Static Electricity

17. Ways to Reduce Static Charges • Spray carpet with antistatic spray / Remove carpet from the house • Use a humidifier when the air is too dry • Use drier sheets – act as conductors and reduce friction between clothes • Remove clothing from the drier before it is completely dry.

18. People who work with electronic equipment take special care to reduce the risk of sparks by wearing grounds themselves or placing them on the equipment.

19. A simple way to prevent static build-up on a car due to friction between tyres and the ground is to use a ground strap • Airplanes have needle-like projections called static wicks located in various places on the wings and plane body. The force of repulsion between charges becomes so strong around a point that charges will disperse into the air from the point. • damage to the building due to lightning can be avoided by the use of lightning rods.