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The study of electric charges at rest is called electrostatics.

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Electric charge are of two types. Positive charges Negative charges

“Charge is not the property of material”

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In electrostatics  we experience the phenomena of  Static Electricity.

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Deluxe Van de Graaff Generator:Education Supplies:Physics Classroom  Products | Fisher Scientific

When you charge up your body by touching the  Van der Graaf generator  . The hair stands because all hair gains the same electric charge and repel each other.

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California lightning tips: What to do - and not do - during a thunderstorm

Lightening during thunderstorm is also the Application of electrostatic.

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Other examples are Photocopier machine Laser and Ink jet printer Electrostatic air filter

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There are three ways in which charges interact each other Conduction  Friction  Polarization

“ In each case , total charge remains the same. This is the law of conservation of charge ”

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Conduction   conduction occurs when there is a direct contact between materials that differ in their ability to give up and accept electrons .

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The transfer of electron from the van der  graaf  generator to the men is the example of charge transfer by conduction.

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Polarization 	 Polarization occurs whenever electron within a neutral object move because of electric field of nearby charged object .

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Electrons in the plate are repelled by the negative charges in the rod. The electrons move  away from the rod , causing one side of plate to become positively charged and the other side to become negatively charged.

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Friction 	electrons are transferred in this way whenever there is a friction between material that differ in ability to accept and give up electrons.

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Electron are transferred from the woolen cloth to the rod , making the rod negatively charged and cloth loss electrons and get positively charged. The rod stick the cloth because opposite charge interacts .

Electrostatics

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