| ELECTRONIC COMPONENTS - CHARGING A CAPACITOR | ||
In order to better understand the action of a capacitor in conjunction with other components, the charge and discharge actions of a purely capacitive circuit will be analyzed. For ease of explanation the capacitor and voltage source shown are assumed to be perfect (no internal resistance), although this is impossible in practice. In this figure, an uncharged capacitor (C) is shown connected to a four-position switch. With the switch in position 1 the circuit is open and no voltage is applied to the capacitor. Initially each plate of the capacitor is a neutral body and until a difference of potential is impressed across the capacitor, no electrostatic field can exist between the plates. |
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