Applications of Static Electricity

advertisement
Applications of Static Electricity
electrostatic spray painting
electrostatic
precipitator
electrostatic duster
Applications of Static Electricity
Conductor: an object that lets electrons move
easily through it
e.g. metal wire
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
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
grounding
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
Negative object: excess electrons flow from
the object to the Earth until it is neutral
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
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
Applications of Static Electricity
Electrostatic Spray Painting: positively
charge the object and negatively charge the
paint particles
Applications of Static Electricity
Electrostatic Spray Painting: positively
charge the object and negatively charge the
paint particles
opposite charges attract
Applications of Static Electricity
Electrostatic Spray Painting: positively
charge the object and negatively charge the
paint particles
opposite charges attract
-paint particles are attracted to the object
and less is lost as over spray
Applications of Static Electricity
Electrostatic Duster: rubbing the duster
across a surface causes the duster to become
charged by friction.
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
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
-neutral dust particles stick to charged duster
Applications of Static Electricity
Electrostatic Precipitator: a device to remove
dust particles from the exhaust gas from
industry
Applications of Static Electricity
Electrostatic Precipitator: a device to remove
dust particles from the exhaust gas from
industry
1. smoke particles pick up a negative charge
Applications of Static Electricity
Electrostatic Precipitator: a device to remove
dust particles from the exhaust gas from
industry
1. smoke particles pick up a negative charge
2. charged particles are attracted to positive
plates
3. clumps of smoke particles collect up on
trays and are removed for disposal
Applications of Static Electricity
Photocopying: selenium is an insulator but
becomes a conductor when exposed to light
Applications of Static Electricity
Applications of Static Electricity
Download