Question

if the current in one coil is steady, what happens to the mutual inductance is​

Answer 1

Answer:

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.

Answer 2

Answer:

The mutual inductance will be zero

Explanation:

The current is induced only when there is a sudden change in the flow of current in a coil causing change in mutual inductance.

Remember, that for mutual induction there is a fluctuation required in the rate of flow of current, it will be zero if the current is kept flowing or flowing at a steady rate.