Capacitor referred capacitors; it is also a major element of the electronic circuit components. It can store electrical energy, with the charge, discharge and through the exchange, DC-blocking properties. In a sense, a bit like a capacitor battery. Although both work in very different ways, but they can store energy.
Battery has two electrodes inside the battery, so that a chemical reaction to produce electron electrode, the other electrode of the electron absorption. The capacitor will have a much simpler, it does not produce electron - it just to store electrons. It is one of the indispensable basic elements of the extensive use of various types of electronic equipment. Various capacitors in the circuit can play different roles, such as coupling and DC blocking, bypass, rectifier filter, high-frequency filter, tuning, storage and division and so on. The capacitor should be selected according to the circuit voltage, frequency, waveform, AC and DC components of temperature and humidity conditions.
Capacitor, typically referred to its ability to hold a charge capacitance, denoted by the letter C. Capacitors, by definition, is 'loaded container electricity', it is a device receiving the charge. English name: capacitor. Capacitor is one of a large number of electronic components used in electronic equipment; it is widely used in the circuit compartment straight cross-connection, coupling, bypass, filtering, tuning circuits, energy conversion and control.
The capacitance of the capacitor is different. Capacitance basic physical quantities, the symbol C, the unit is F (farad).
General formula C = Q / U parallel plate capacitor special formula: electric field strength between the plates E = U / d, the capacitor capacitance of the formula C = εS / 4πkd.