20.1 Inductors, Coils, and Magnetic Flux20.1.1 What Is an Inductor?20.1.2 What Is Magnetic Flux?20.1.3 What Is the Difference Between Electric and Magnetic Fields20.2 Induced Voltages20.3 Resisting Changes in Current20.4 Analogy from Mechanics20.5 Uses of Inductors20.6 Inductive KickReviewApply What You Have Learned