f #note

Capacitor

A capacitor is an electrical device that stores energy and releases it latter, it is diferent from a battery in two key ways :

  • It charges very quickly (on the order of seconds)
  • It discharges very quickly (on the order of fractions of a second to a second)

The tradof to those two advantages is that its storage capacity is very small, for both its volume and its weight.

Working principle

A capcitor works by building up energy between two plates, seperated by an electrolite. In modern capaciors, the two plates are actualy foils, wound up in a circular capsule, or stacked horizontaly in a ceramic binder.

Its elecrital symbols are the folowing :