Electromagnetic Induction

Two coils have a mutual inductance of \(0.004 \mathrm{~H}\). The current changes in the first coil according to equation \(\mathrm{I}=\mathrm{I}_0 \sin \omega \mathrm{t}\), where \(\mathrm{I}_0=10 \mathrm{~A}\) and \(\omega=50 ~\pi \mathrm{~rad} ~\mathrm{s}^{-1}\). The maximum value of e.m.f. in the second coil in volt is