A varying current at the rate of 3 A/s in a coil generates an e.m.f. of 8 mV in a nearby coil. The mutual inductance of the two coils is
2.66 mH
2.66×10−3 mH
2.66 H
0.266 H
|e| =Mdidt⇒8×10−3=M×3⇒A1=2.66mH