This lecture covers the principles of capacitors and inductors in electrical circuits, including their behavior in alternating current circuits, energy accumulation, and applications in asynchronous motors. It also discusses the concept of capacitance, energy storage in capacitors, and the properties of supercapacitors. Furthermore, it explores the role of inductors in circuits, the generation of induction fields, and the calculation of inductance. The lecture concludes with a focus on continuous duty behavior and the impact of inductance on electrical systems.