Static Electricity Videos

Static Electricity Videos

http://www.youtube.com/watch?v=VhWQ-r1LYXY

http://www.youtube.com/watch?v=WohRAM4_NQg

http://www.youtube.com/watch?v=b89x8CAS6xU

http://www.youtube.com/watch?v=VhWQ-r1LYXY





Applications of Static Electricity


Grounding: connecting an object to a large body, like Earth, that is capable of removing any excess electric charge on the object


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


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


electrostatic spray painting

electrostaticprecipitator

electrostatic duster

Paint Spraying

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

The defibrillator

Saving your life!Saving your life!

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

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.

Safety

It is important when using a defibrillator that no one touches the patient or any exposed contacts on the defibrillator

Clear!Or else they may become the next patient!

A big enough electric shock can cause defibrillation.


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


Electrostatic Duster: rubbing the duster across a surface causes the duster to become charged by friction.



charged objects attract neutral objects



charged objects attract neutral objects

-neutral dust particles stick to charged duster


Electrostatic Precipitator: a device to remove dust particles from the exhaust gas from industry



1. smoke particles pick up a negative charge



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


Photocopying: selenium is an insulator but becomes a conductor when exposed to light

Photocopiers

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

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.



Documents

Static Electricity Videos