There are various types of cables, including twisted pair cable, coaxial cable, multi conductor cable and fiber optic cable.
1. Twisted pair cable – A twisted pair cable has two cables that are twisted across each other. Twisting can avoid noise that produced by magnetic coupling, so this type of cable is best suited for carrying signals. It is generally used in telecommunication and data communication.
2. Multi-conductor cable – Multi conductor cable has two or more conductors that are insulated from each other. Their purpose is to protect signal integrity by reducing hum, noise and crosstalk. Applications include computers, communications, instrumentation, sound, control, audio, and data transmission. Both multi conductor and twisted pair cables are called balanced line configuration cables.
3. Coaxial cable – Coaxial cable is composed of an inner solid conductor surrounded by a paralleled outer foil conductor that is protected by an insulating layer. The two conductors are separated from each other by an insulating dielectric. Coaxial cables are generally used in TV Cable. It is called an unbalanced line as the signal on the two conductors is not same, which result in interference but the performance is more stable than a twisted pair cable.
4. Fiber optics cable – This kind of cable transmits signals by a bundle of glass threads. Fiber optic cables have a much greater bandwidth than metal cables, which means they can carry more data. They are also less susceptible to interference. For these two reasons, fiber optic cables are increasingly being used instead of traditional copper cables despite that they are expensive.
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