• # question_answer A current $I\,\,=\,\,10\text{ }sin\,\,(100\pi \,t)$ amp. is passed in first coil, which induces a maximum e.m.f of 57i volt in second coil. The mutual inductance between the coils is- A) 5 mH               B) 10 mHC) 15 mH             D) 20 mH

${{e}_{0}}\,\,=\,\,M{{I}_{0}}\omega$ $M=\frac{{{e}_{0}}}{{{I}_{0}}\omega }$