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If the current in one coil is steady, what happens to the mutual inductance?

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in Basic Electrical Engineering by (88.7k points)
If the current in one coil is steady, what happens to the mutual inductance?

(a) Zero

(b) Infinity

(c) Doubles

(d) Halves

I had been asked this question in an international level competition.

This interesting question is from Mutual Inductance in chapter Inductance in a DC Circuit of Basic Electrical Engineering

1 Answer

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Best answer
Correct option is (a) Zero

The explanation: A current is induced when there is changing magnetic flux. The induced current in neighbouring coil is zero when the current is steady. So, mutual inductance is zero.

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