What is a capacitor? A capacitor is an electronic component that stores charge and creates an electric field. It is a very common component in electronic devices and is used for a variety of functions, including filtering, coupling, timing, and energy storage. The basic working principle of a capacitor is to store charge by using an insulator (called the "dielectric") between two ... https://www.jinftry.com/news/A-detailed-guide-to-capacitor-symbols