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TRANSCRIPT
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Static Electricity Videos
http://www.youtube.com/watch?v=VhWQ-r1LYXY
http://www.youtube.com/watch?v=WohRAM4_NQg
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Applications of Static Electricity
SNC1D
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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
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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
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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 neutralPositive object: electrons flow from the
Earth to the object until it is neutral
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Applications of Static Electricity
electrostatic spray painting
electrostaticprecipitator
electrostatic duster
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Paint Spraying
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Summary of PaintsprayingThe paint is charged as it comes out of the nozzle.
The paint spreads out in a spray due to repulsion
The car must be connected to the opposite voltage.
The paint is attracted to the oppositely charged car.
The paint is applied evenly all over
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The defibrillator
Saving your life!Saving your life!
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In some heart conditions the electrical impulses which are necessary for the proper operation of the heart fall into disorderThe heart chambers flutter rather than pulse rhythmically. Little or no blood will be pumped like this so the sufferer is in mortal danger.
What is Fibrillation ?Normal heart rhythm
Trace showing ventricular fibrillation
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Defibrillation
In order to save the life of someone with a fibrillatingheart a defibrillator can be used.
Electrolyte gel is smeared on electrodes (known aspaddles) which are placed on the patients body eitherSide of the heart.
A large voltage is applied across these electrodes todrive a current through the patient’s heart. This currentcan restore normal heart rhythms.
If a persons heart is showing no electrical impulses thendefibrillation will not revive them.
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Safety
It is important when using a defibrillator that no one touches the patient or any exposed contacts on the defibrillator
Or else they may become the next patient!
A big enough electric shock can cause defibrillation.
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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
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Applications of Static Electricity
Electrostatic Duster: rubbing the duster across a surface causes the duster to become charged by friction.
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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
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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
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Applications of Static Electricity
Electrostatic Precipitator: a device to remove dust particles from the exhaust gas from industry
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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
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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 charge2. charged particles are attracted to positive plates3. clumps of smoke particles collect up on
trays and are removed for disposal
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Applications of Static Electricity
Photocopying: selenium is an insulator but becomes a conductor when exposed to light
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Photocopiers
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How it worksA Photocopier uses static charge to apply toner(black powder) to the paper
1. A high voltage charged wire transfers positive charge to the drum
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2. The Drum becomes charged evenly over its whole surface.
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3. Light removes charge from the parts which are not to be printed.
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4. Charge attracts toner particles.
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5. Toner is rolled onto the page
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6. Toner is melted onto the paper.
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Applications of Static Electricity
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Applications of Static Electricity