Page 301 - Basic Electrical Engineering

Figure 3.14 (a) Inductive circuit with a sinusoidal voltage input; (b) wave shapes of voltage, current,
and power; (c) phasor diagram

This EMF will oppose the voltage applied (remember Lenz’s law). Therefore,

we can write

or, L di = v dt = V sin ωt dt
m

or,

Integrating