ABSTRACT

Electromagnetic induction, that is, the generation of induced electromotive forces (emfs) and their associated currents (Faraday’s law) is a beautiful law of physics and is an excellent illustration of the aesthetic behavior of nature. The practical consequences of it are the basis for the electrification of modern civilization. The brilliant English experimentalist, Michael Faraday (1791-1867), and an equally competent American scientist, Joseph Henry (1797-1878), performed the first recorded experiments on induction (Figure 17.1). Faraday published his experiments earlier than Henry so his name is associated with the phenomenon and the law that quantifies it. The foundations of Faraday’s law are illustrated by the following experiments.