A capacitor is a device for storing electric charges or for storing electricity
The three types of capacitors are:
(1) Variable air capacitor
(2) paper capacitor
(3) Electrolytic capacitor
Appliances that use capacitor are:
1. Radio tune circuit
2. Car ignition system
3. Induction coil to eliminate spark when a circuit containing inductance is opened suddenly.
4. Fluorescent light tube starter
5. Starter of electric pumping machine