List of top Physics Questions on Electromagnetic induction asked in GUJCET

A coil has $N$ turns and current passes through it is $I$ ampere then we obtain $L$ of self inductance. Now if current is made doubled then new self inductance be ______ H.
The dimensional formula of $\frac{B^2}{2\mu_0}$ is ______.
Two concentric circular coils, one of small radius $r_1$ and the other of large radius $r_2$, such that $r_1 \ll r_2$, are placed co-axially with centres coinciding. The mutual inductance $M$ of the arrangement is proportional to ______.