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Advantages and Disadvantages of Static Electricity
Transcript of Advantages and Disadvantages of Static Electricity
Static electricity - is an imbalance of electric charges within or on the surface of a material. The charge remains until it is able to move away by means of an electric current or electrical discharge.
What is Static electricity?
Advantages of Static Electricity.
1. Van De Graaff Generator
A Van de Graaff generator is an electrostatic generator which uses a moving belt to accumulate very high amounts of electrical potential on a hollow metal globe on the top of the stand. It was invented by American physicist Robert J. Van de Graaff in 1929. A Van de Graaff generator operates by transferring electric charge from a moving belt to a terminal. The high voltages generated by the Van de Graaff generator can be used for accelerating subatomic particles to high speeds, making the generator a useful tool for fundamental physics research.
2. Spray Paint
In car spraying, the material of the car surface is normally positively charged due to it metallic nature and by use of electricity. On the other hand, the paint used to cover the surface are often negatively charged by means of anion (negatively charged ions) particles present in the paint. When the paint are applied on the car surfaces, the static electricity will holds the paint to the surface very strongly till the paint are dry.
A photocopier uses electrostatic charge to produce a copy. The original (the page you want copied) is placed onto a sheet of glass. An image of this page is projected onto a positively charged drum. The drum has a coating that conducts electricity when light falls on it. The parts of the drum which are lit by the projected image lose their electrostatic charge when they start to conduct. A black powder (called toner) is negatively charged. The toner is attracted to the positively charged parts of the drum. The drum rotates and rolls against a piece of copier paper. The toner is transferred from the drum to the paper making a black and white image of the original.
Electrostatic dust precipitators.
Smoke is produced when fossil fuels burn. Smoke is made of tiny solid particles, such as carbon. To remove these particles from the waste gases an electrostatic precipitator is used.
The process involves three stages:
Smoke particles pick up a negative charge
Smoke particles are attracted to the collecting plates
Collecting plates are knocked to remove the smoke particles
Lightning may not look much like static electricity, but actually they are similar. Both are sparks of electricity created through the attraction of unlike charges. The only difference is that static electricity creates a small spark, while lightning is a huge spark of electricity on a large scale. For a spark to occur, it will need both a non-conductor and a conductor or two conductors with great differential resistance. These conditions include the rapid movement of tiny water particles in a storm. Certain conditions will cause enough static electricity buildup to cause a spark or lightning. Lightning is an extreme example of a spark. A spark is a stream of electrons jumping across an air gap, heating the air until it glows and expands.
You touch something with a large electric charge on it. The charge will flow through your body causing an electric shock. This could cause burns or even stop your heart. A person could die from an electric shock.
Rounds at the truck runs produce negative charge derived from the friction of the tire with the road. The inside of the metal adjacent to the tire becomes positively charged by induction. This can cause fire. To avoid such events, truck of gasoline or other flammable materials come with a piece of metal at the rear of the car touches the ground. The metal is delivering electrons from the ground to neutralize the positive charge on the metal body car before the fire.
2. Electric Shock.
3.Fire in fuel trucks