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Partially Filled Capacitor


	A capacitor is an electrical device that stores energy. Between its two plates a capacitor can be filled with some material or evacuated to leave a vacuum. A partially filled capacitor is equivalent to two capacitors connected in a series, one with the material and the other empty.


	Contributed by: Enrique Zeleny
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The capacitance is

,

where

is the percentage of the capacitor filled,

the separation between the original plates,

the dielectric constant, and

the permittivity in a vacuum. Simplifying,

.

In this example,

and

.

Capacitor (ScienceWorld)

Capacitance (ScienceWorld)

Farad (ScienceWorld)

Permittivity of Free Space (ScienceWorld)

"Partially Filled Capacitor" from The Wolfram Demonstrations Project
http://demonstrations.wolfram.com/PartiallyFilledCapacitor/

Contributed by: Enrique Zeleny

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