Abstract
Publisher Summary The basic physics of an electric generator is that it provides electricity for the modern society. In general, a changing magnetic field creates an electric field. That is defined as Faraday's law of induction. The directions of the induced electric field and the induced electric current, if there is a complete circuit, are governed by Lenz's law. Lenz's law is a law of opposition and essentially a law of conservation of energy. The chapter provides an overview of Faraday's law when applied to a few circuits. It discusses Faraday's law of electromagnetic induction. The chapter presents a picture of electromagnetic induction in terms of Faraday's magnetic field lines. Whenever a conductor or portion of a conductor moves across a magnetic field, an emf is generated. If that induced emf is not balanced by other emfs, charges will flow. In low-resistance circuits, the currents may be quite large. Those internal circulating currents are called eddy currents because of their resemblance to the eddies in the flow of fluids. As described by Lenz's law, the eddy currents will circulate in such a way as to oppose the motion that induced them.
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