Applications of electrostatics

Photocopier An electrostatic copier works by arranging positive charges in a pattern to be copied on the surface of a non-conducting drum, and then gently sprinkling negatively charged dry toner particles onto the drum. The toner particles temporarily stick to the pattern on the drum and are later transferred to the paper and ‘melted’ to produce the copy. Spray Painting …

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Fires due to electrostatic charges

Tyres of a moving truck acquire negative charge by friction from the road. Parts of the metal body of the truck near the tyres then become positively charged by induction and sparks may be produced. This can cause flammable material in the truck to catch fire or explode. That is why trucks carrying inflammable liquids usually have a metal chain …

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Lightning as potential electrostatic hazards

  Thunderclouds are charged with a large amount of negative charges. The charges arise due to the friction between the water molecules and air molecules as the wind shifts them around. These highly charged clouds ionize the air around it, which causes the air bodies near the clouds to be slightly conductive. The Earth is at a higher potential than …

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Electrical Insulators And Conductors

Materials that allow electrons to flow through them easily are called electrical conductors. In all metals, outermost electrons in each atom are so loosely held that they are able to move freely between atoms. These free electrons make metals very good electrical conductors. Non-metals, such as graphite and some solutions are also good conductors. Conductors can be discharged through a …

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Charging by rubbing

This is a familiar electric phenomenon in which friction transfers charged particles from one body to another. If two objects are rubbed together, especially if the objects are insulators and surrounding air is dry, the objects acquire equal and opposite charges and an attractive force develops between them. The object that loses electrons becomes positively charged. The other that gains …

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Electrostatic

In electrostatics, we study the electromagnetic phenomena that occur when there are no moving charges (After a static equilibrium has been established). Charges reach their equilibrium positions rapidly because the electric force is extremely strong. Electric Charge All substances are made up of atoms, which consist of a nucleus (containing protons and neutrons) and orbiting electrons. Protons are positively charged …

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Static Electricity

This topic covers “Static Electricity” of O Level Physics. (Equivalent to American high school diploma) If this is too basic for you, you can try the more advanced version here. Sub-Topics: Electrostatics Charging By Rubbing Ways To Charge Conductors Field And Charges Drawing Field Lines Electrical Insulators and Conductors Lightning as potential electrostatic hazards Fires due to electrostatic charges Applications of …

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