Quite often, connecting wires carrying currents in opposite directions are twisted together in using electrical appliances. Explain how it avoids unwanted magnetic fields.

Quite often, connecting wires carrying currents in opposite directions

1.	Quite often, connecting wires carrying currents in opposite directions are twisted together in using electrical appliances. Explain how it avoids unwanted magnetic fields.
Answer» It is so because the magnetic field `vecB` at a point is a function of distance and direction of current. Twisting of wires eliminates the magnetic effects at a distant point because of the following reasons: (i) average distance is practically the same and (ii) current flows in the two wires in opposite directions.

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Quite often, connecting wires carrying currents in opposite directions are twisted together in using electrical appliances. Explain how it avoids unwanted magnetic fields.

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