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^(2)//L`
C. `L//l`
D. `L^(2)//l`

Answer 1

Correct Answer - B
Resonant frequency in an LCR series circuit is `v_(r) = (1)/(2 pi sqrt(LC))`
To reduce `v_(r)` , c can be increased, by adding another capacitor in parallel to the first. Choice (b) is correct.