Question

Two circular loops are placed with their centers separated by a fixed distance. Their orientation, such that they have the zero mutual inductance, is -

• A. The two loops should be placed co-axially with planes in parallel.
• B. The two loops should be placed such that their axes are perpendicular.
• C. Either $\left(A\right)$ or $\left(B\right)$
• D. None of these

Answer 1

The correct option is B The two loops should be placed such that their axes are perpendicular.

For the zero mutual inductance, the two loops should be placed such that their axes are perpendicular to each other.

Because, in this case, they share zero magnetic flux, so their mutual inductance is zero.

Hence, option $\left(B\right)$ is the correct answer.