Capacitance, short for capacitance, is one of the electronic components widely used in electronic equipment, widely used in straight separation, coupling, bypass, filtering, tuning loop, energy conversion, control circuit and so on.

Capacitance, also known as capacitance, refers to the amount of 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. Because capacitors are one of the most widely used electronic components in electronic devices, they are widely used in straight separation, coupling, bypass, filtering, tuning loop, energy conversion, control circuit and so on. Capacitors are divided into electrolytic capacitors, solid capacitors, etc.

Main characteristics of capacitance

In circuitry, the capacitance of a capacitor at a certain potential difference (1U), called the capacitance, is labeled C. The international system of units is adopted, and the unit of capacitance is farad, referred to as the method; Let's label it F.

The symbol for the capacitor is C.

C=εS/d=εS/4πkd (vacuum) =Q/U

In the international System of units, the unit of capacitance is farad, referred to as the law, the symbol is F, because the farad unit is too large, so the commonly used capacitance units have millimetre (mF), micromethod (μF), nanomethod (nF) and skin method (pF), etc., the conversion relationship is:

1 farad (F) =1000 milliways (mF) =1000000 microways (μF)

1 micromethod (μF) = 1000 nanomethod (nF) = 1000000 picomethod (pF).

The relationship between capacitance and battery capacity:

1 volt-ampere hour =1 watt-hour =3600 joules

30 w = 30 0.5 cuu