Electromagnetic Induction

This lecture explores the phenomenon of electromagnetic induction, focusing on the generation of induced voltage when a magnetic field varies. The instructor explains the concept using a moving bar immersed in a magnetic field, discussing the factors affecting the induced voltage such as magnetic field strength and bar length. The lecture delves into the general rule for induced voltage, introducing the concept of magnetic flux and its relationship with voltage. It also covers the application of Lenz's law and the direction of induced voltage, emphasizing the importance of considering signs in electromagnetic induction. The discussion extends to closed circuits with resistance, highlighting how induced current interacts with magnetic fields to oppose changes, ultimately illustrating the fundamental principle of energy conservation in electromagnetic systems.