Consider I_1 and I_2 are the currents flowing simultaneously in two nearby coils 1 & 2, respectively. If L_1= self inductance of coil 1, M_12= mutual…

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