A circular current loop of radius R is placed inside square loop of side length L(L ≫ R) such that they are co-planar and their centers coincide. The…

A circular current loop of radius $\displaystyle R$ is placed inside square loop of side length $\displaystyle L(L \gg R)$ such that they are co-planar and their centers coincide. The permeability of free space is $\displaystyle \mu_0$. The mutual inductance between circular loop and square loop is $\displaystyle \_\_\_\_$.