What are the key principles of electromagnetic induction?
Electromagnetic induction is the process of generating electric current with a changing magnetic field. It's based on two key principles: first, a changing magnetic field within a coil of wire induces a voltage across the ends of the coil; second, if the coil is closed through an electrical load, this induced voltage generates an electric current. This principle is the fundamental operating mechanism behind generators, transformers, induction motors, and many types of electrical sensors.