How does crosstalk reducein twisted pair wire?

Answer 1

Crosstalk occurs in twisted pair wire when a current or signal in one wire can produce an unwanted current or signal. If the two wires run parallel to each other the chance for crosstalk increases.

Mutual inductance is a consequence of an alternating current (AC) in one conductor developing a fluctuating magnetic field which induces current flow in another close-coupled conductor. In computer networking or communication, this is termed cross-talk.

The signal in the source wire is mirrored (at a lower strength) in the other. Where two conductors run parallel to one another for long lengths, the cross-talk signal is additive and can be considered as noise, where the other conductor is carrying its own signal.

Answer 2

A signal traveling through one wire creates a magnetic field around that wire. If a second wire runs parallel to the first, a magnetic field passing through the second wire will induce a current in the second wire.