Although the industry uses various types of capacitors, the construction of a capacitor is quite simple. It has to two electrically conducting plates with a dielectric material between them. Capacitors are widely used in power distribution systems for maintaining the power factor to as near unity as possible. All types of capacitors are used: low, medium and high voltage.
Telecommunication equipment use capacitors widely for varying the operating frequency and tuning of the equipment. Capacitors use a variety of dielectric materials such as ceramic, polystyrene, polyester, tantalum, paper, plastic, etc. Capacitors have a voltage rating and their capacity is measured in Farads.
