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Published byDarleen Carpenter Modified over 9 years ago
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By: Savannah Dotterman
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A physical amount of matter that makes it go through an electric reaction when its around or near other electrically charged things. There are two types of electrical charges called positive and negative. A negative charge and a positive charge attract towards each other. Two negatives or two positives repulse against each other.
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Electricity that surrounds electrically charged particles and time-varying magnetic fields. They exert a force on other electrically charged objects. Electric fields contain electrical energy with energy density proportional to the square of the field amplitude.
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The build up of electric charge on the surface of objects. The static charges remain on an object until they either bleed off to ground or are quickly neutralized by a discharge. The familiar phenomenon of a static 'shock' is caused by the neutralization of charge.
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When the electromagnetic field is used to transfer energy between two objects. A charging station sends energy through inductive coupling to an electrical device, which stores the energy in the batteries. Induction chargers typically use an induction coil to create another electromagnetic field from inside a charging base station, and a 2nd induction coil in the portable device takes power from the electromagnetic field and takes it back into electrical current to charge the battery.
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