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Postby TGTS0907129» Simple capacitors

What are simple capacitors

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A simple capacitor might consist of two large, parallel metal sheet insulated from each other and their surrounding and placed close together with empty space between them. If a device for moving charge through a potential difference such as a Van de Graaff generator or a battery is connected to these plates, electrons are driven, onto one plate and removed from the other. The close association of the opposite charges on the two plates has the effect of making the work need to place additional charge on the plates very much less than would be the case if the plates were not close together. This fact may be understood by considering a sample positive charge q being carried toward the positively charged plate. It experiences repulsion due to the positive charge on the plate but an almost equal attraction due to the negative charge only slightly farther away. For a given amount of energy available to transfer charge, the amount of energy available to transfer charge, the amount of charges that can be transferred is increased by the closeness of the plates. Or, for a given charge transferred, the work per unit charge, or the potential difference, is smaller than would be the case if the plates were spaced.

The close spacing of most capacitor plates is achieved by separating the conducting sheets with a thin sheet of mica or paper.

By TGTT23071246 on 10/13/2015 4:23:18 AM
TGTS0907129 on 10/13/2015 4:20:48 AM
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