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Applications of Static Electricity SNC 1 D

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

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 electrostatic precipitator electrostatic duster

Paint Spraying

Summary of Paintspraying The 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

The defibrillator Saving your life!

What is Fibrillation ? Normal heart rhythm In some heart conditions the electrical impulses which are necessary for the properation of the heart fall into disorder The heart chambers flutter rather than pulse rhythmically. Little or no blood will be pumped like this so the sufferer is in mortal danger. Trace showing ventricular fibrillation

Defibrillation In order to save the life of someone with a fibrillating heart a defibrillator can be used. Electrolyte gel is smeared on electrodes (known as paddles) which are placed on the patients body either Side of the heart. A large voltage is applied across these electrodes to drive a current through the patient’s heart. This current can restore normal heart rhythms. If a persons heart is showing no electrical impulses then defibrillation will not revive them.

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.

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

Photocopiers

How it works A Photocopier uses static charge to apply toner (black powder) to the paper 1. A high voltage charged wire transfers positive charge to the drum

2. The Drum becomes charged evenly over its whole surface.

3. Light removes charge from the parts which are not to be printed.

4. Charge attracts toner particles.

5. Toner is rolled onto the page

6. Toner is melted onto the paper.

Applications of Static Electricity

Applications of Static Electricity