AC Circuits: Impedance and Reactance

This lecture covers the calculation of reactances and impedance in AC circuits, the generalized Ohm's law, resistance, reactance, and impedance in the Drude model, operations with complex components, rotating vectors of current and emf, and the behavior of current in a circuit with a given emf. The lecture also discusses the phase difference between current and voltage vectors, the representation using imaginary trigonometric functions, and the characteristics of perfect inductors and capacitors. Practical examples and observations are provided to illustrate the concepts.