Question

A small square loop of wire of side $l$ is placed inside a large square loop of wire of side $L(L>>l)$.
The loops are co-planar and their centres coincide. The mutual inductance of the system is proportional to:

• A. $l/L$
• B. $l^2/L$
• C. $L/l$
• D. $L^2/l$

Answer 1

The correct option is B $l^2/L$