Physics - EMI/AC Question with Solution | TestHub

Consider ${\mathrm{I}}_1$ and ${\mathrm{I}}_2$ are the currents flowing simultaneously in two nearby coils 1 & 2, respectively. If ${\mathrm{L}}_1=$ self inductance of coil $1,{\mathrm{M}}_{12}=$ mutual inductance of coil 1 with respect to coil 2, then the value of induced emf in coil 1 will be