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The twisting in a twisted pair cable helps make the cable immune to electromagnetic interference. These cables are of two types: Shielded and unshielded twisted pair.
if by "twisted pair cable" you mean a cat5 cable which is commonly used as an ethernet cable. then it´s made of copper.
with RJ 45 conecter & unshilded twisted pair cable
Twisted pair wiring is a digital signal.Coaxial cable is an analog signal.
twisted pair cable can used as LAN connections....for example CAT5 and CAT6 both twisted pairs.
cable
Shielded Twisted pair cable
A twisted pair cable consists of two copper conductors, each one with its own plastic insulation and twisted together
Twisted pair wires have twists that are a certain number of twists per foot depending on twisted bundle size. The purpose of the twists is so the magnetic field that rises and collapses around each wire within the twisted pair cancel each other out since they are of opposite polarity. The coaxial cable is just a single conductor within a grounded braid or foil jacket to help prevent unwanted magnetic fields (signals) from entering the actual signal wire that is in the center.
Twisted pair cables were invented by Alexander Graham Bell in 1881.
CAT 5 Cable and RJ 45 Cable (Twisted-pair Ethernet). Unshielded twisted-pair (UTP) cable