A capacitor is a passive electronic component used to store electrical energy in an electric field. It is a two-terminal electrical component used to store energy electrostatically in an electric field. Capacitors consist of two conductors separated by an insulator.
Capacitors are used in electronic circuits to block the flow of direct current while allowing alternating current to pass. They are also used to store energy for later use, such as in camera flashes and defibrillators. Capacitors come in a variety of shapes and sizes, and their capacitance can range from picofarads (pF) to farads (F).