Mutual inductance
A.J. Watkins · 2010
If two coils A and B have mutual inductance M henrys, the e.m.f. in coil A due to current change in coil B is eA = M×rate of change of current in coil B Thus, if the current in coil B has values I1 and I2 at instants of time t1 and t2, e = M× I2 − I1 t2 − t1 volts Two coils have mutual inductance 3H. If the current through one coil changes from 0.1 A to 0.4 A in 0.15 s, calculate the e.m.f. induced in the other coil.