Capacitor, usually referred to as its ability to hold charge, is capacitance, which is represented by the letter C. Definition 1: a capacitor, as the name suggests, is a 'container for electricity', which is a device that contains charges. English Name: capacitor. Capacitor is one of the electronic components widely used in electronic equipment. It is widely used in circuit isolation, direct intersection, coupling, bypass, filtering, tuning loop, energy conversion, control and so on. Definition 2: capacitor. Any two conductors (including conductors) insulated from each other and closely separated from each other form a capacitor.
capacitors are different from capacitors. Capacitance is the basic physical quantity, symbol C, unit f (farad).
general formula C = q / u, special formula for parallel plate capacitor: electric field intensity between plates e = u / D, capacitor capacitance determination formula C = & epsilon; S/4π KD
with the rapid development of electronic information technology, the upgrading speed of digital electronic products is faster and faster. The production and sales of consumer electronic products dominated by flat-panel TVs (LCD and PDP), laptops, digital cameras and other products continue to grow, driving the growth of capacitor industry.
the capacitor is composed of two electrodes and dielectric materials between them. Dielectric material is a kind of dielectric. When it is placed in the electric field between two parallel plates with equal anisotropic charges, polarization charges are generated on the surface of the medium due to polarization, so the charges bound on the plates increase accordingly and the potential difference between the plates remains unchanged. This is why capacitors have capacitive characteristics. The electric quantity Q stored in the capacitor is equal to the product of the capacitance C and the potential difference u between the electrodes. Capacitance, plate area and dielectric constant of dielectric material & epsilon; It is directly proportional to the thickness of the dielectric material (i.e. the distance between the plates).