Refers to the amount of charge stored at a given potential difference, also known as capacitance.
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The charge is forced to move in an electric field. When there is a medium between conductors, it will hinder the movement of charge, so that the charge accumulates on the conductor, resulting in the accumulation and storage of charge. Any electrostatic field consists of many capacitors. If you have an electrostatic field, you have a capacitor. An insulating conductor and infinity form a capacitor. Conductor grounding is equivalent to infinite grounding and grounding.
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The capacitor mainly represents the physical quantity of the capacitor to hold the charge power, mainly used in power filter, signal filter, signal coupling, resonance, filter, compensation, charge and discharge, energy storage, DC and other circuits.