Capacitor, usually referred to simply as its ability to hold charge, is a capacitor, which is represented by the letter C. Definition 1: A capacitor, as its name implies, is a' charged container' and a device that holds charge. English name: capacitor. Capacitor is one of the electronic components widely used in electronic equipment, which is widely used in blocking DC, coupling, bypass, filtering, tuning circuit, energy conversion, control and so on. Definition 2: capacitor, any two conductors (including wires) that are insulated from each other and closely spaced form a capacitor.
Capacitance is different from capacitor. Capacitance is a basic physical quantity, with symbol c and unit f (farad).
General formula C=Q/U parallel plate capacitor special formula: electric field intensity between plates E=U/d, and capacitor capacitance determination formula C=εS/4πkd.
With the rapid development of electronic information technology, the upgrading speed of digital electronic products is getting faster and faster. The production and sales of consumer electronic products, mainly flat-panel TVs (LCD and PDP), notebook computers, digital cameras and other products, continued to grow, which led to the growth of the capacitor industry.
Inductor is an element that can convert electric energy into magnetic energy and store it. The structure of inductor is similar to that of transformer, but there is only one winding. Inductor has a certain inductance, which only hinders the change of current. If the inductor is in a state where no current passes, it will try to stop the current from flowing when the circuit is connected; If the inductor is in a state of current flow, it will try to keep the current constant when the circuit is disconnected. Inductors are also called chokes, reactors and dynamic reactors.