Question

Two coils having the same self inductance are arranged in four different configurations as shown in the options. Which of the following configurations has the maximum value of coupling constant?

• A.
• B.
• C.
• D.

Answer 1

The correct option is A

For maximum value of coupling constant, there should be maximum flux sharing between the coils.

In configuration of option $\left(A\right)$, there is maximum flux linkage between the two coils and hence the value of coupling constant will be maximum.

Therefore, option $\left(A\right)$ is the correct answer.