Question

A small square loop of wire of side l is placed inside a large square loop of wire of side `L(Lgtgtl)`. The loops are co-planer and their centres coincide. The mutual inductance of the system is proportional to
A. `L//l`
B. `l//L`
C. `L^(2)//l`
D. `l^(2)//L`

Answer 1

Correct Answer - D
Flux `= Mi = BA, M prop (l^(2))/(L)`