Question

A coil has an inductance of 9.00 mH, and the current in it changes from 0.200 A to 1.50 A in a time interval of 0.300 s. Find the magnitude of the average induced emf in the coil during this time interval.

Answer 1

E = L*di/dt = (9*10^-3)*(1.5-0.2)/0.3 = 4.33 Volts.

Answer 2

Correction: E = 0.039 Volts.