A capacitor is a type of passive electronic component. They have two terminals and they are utilized to store energy. In some ways, they are similar to a battery. The energy is stored in an electrostatic field. This is accomplished with a design that utilizes two electrical conductors that are separated from one another by an insulator.
Capacitors are commonly utilized to block direct current in electric circuits. Their design allows alternating current to pass through them. They are utilized in many different applications, including in radio tuners, voltage stabilizers and other devices.