The capacity of a capacitor refers to the charge storage capacity under a given potential difference, also known as electrical capacity.
Two conductors close to each other, with a layer of non-conductive insulating medium sandwiched between them, constitute a capacitor. When a voltage is applied between the two plates of a capacitor, the capacitor will store electric charges. The capacitance of a capacitor is numerically equal to the ratio of the charge on one conductive plate to the voltage between two plates. The basic unit of capacitance of capacitor is Farad (F). In the circuit, the letter C is usually used to indicate the capacitive element. Capacitors play an important role in tuning, bypass, coupling, filtering and other circuits. It is used in the tuning circuit of transistor radio, as well as in the coupling circuit and bypass circuit of color TV. With the rapid development of electronic information technology, the upgrading of digital electronic products is faster and faster. The production and sales of consumer electronic products, mainly flat screen TVs (LCD and PDP), laptops, digital cameras and other products, continue to grow, driving the growth of the capacitor industry.