electromagnetic induction?

Question

wires that carry telephone signals are twisted.the twisting reduces the noise on the line from nearby electric devices that produce changing currents.how does the twisting reduce noise pickup?.

Answer 1

With it twisted, both wires tend to have equal or near equal exposure to the noise source. With equal voltage change in both wires, the voltage difference between wires is zero.

Answer 2

I assume it regularizes the electrogenic interference generated by random signal sources.