Capacitance, also known as capacitance, refers to the amount of free charge stored at a given potential difference, denoted C, in SI units of farads (F). In general, the charge will be forced to move in the electric field, when there is a medium between the conductors, it prevents the charge from moving and makes the charge accumulate on the conductor, resulting in the cumulative storage of the charge, the amount of charge stored is called capacitance.
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Capacitance is the ability to hold an electric charge. Any electrostatic field is composed of many capacitors, there is an electrostatic field there is a capacitor, capacitor is described by electrostatic field. It is generally believed that an isolated conductor and infinity constitute a capacitor, and a conductor grounded is equivalent to being connected to infinity and connected to the earth as a whole.
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Capacitance (or capacitance) is a physical quantity that represents the capacity of a capacitor to hold charge. Capacitors from physics, it is a static charge storage medium, the charge may exist permanently, this is its characteristics, it is widely used, it is an indispensable electronic component in the field of electronics and power. Mainly used in power filter, signal filter, signal coupling, resonance, filter, compensation, charge and discharge, energy storage, DC isolation circuit.