What is capacitance（1）

Any two conductors that are insulated from each other and close to each other can form a capacitor. Capacitance is a physical quantity that characterizes a capacitor's ability to hold an electric charge. The simplest capacitor is formed by sandwiching a layer of insulating material (dielectric) between two parallel metal plates that are very close to each other, which is called a parallel plate capacitor.

Figure 1: Meto-plate capacitance and calculation formula

First, the working principle of the capacitor:

The capacitor is composed of two electrodes and the dielectric material between them, the dielectric material is a dielectric, when placed in the charge between two parallel plates with an equal amount of anisotropic charge, the polarization on the surface of the dielectric is generated due to polarization, so that the charge bound to the plate increases accordingly, and the charge between the plates is maintained.

Screenshot _20241204092401.png of WeCom

Figure 2: Capacitor charging and discharging process