ABSTRACT
This chapter explains Faraday's and Lenz's Laws for electromagnetic induction and examines list the factors that affect the self-induction of a coil. It also explains the result of moving a permanent magnet towards, or away from, a coil and describes the effect of moving a straight conductor perpendicularly through a magnetic field. The chapter evaluates the magnitude and direction of the potential difference induced into a straight conductor moved perpendicularly through a magnetic field and demonstrates the application of Fleming's Right-Hand Rule for generator action. It also examines the terms 'mutual inductance' and 'coupled circuits' and explores the behaviour of the mutual induction between two inductive circuits. Two practical examples of mutually-inductive circuits are a motor vehicle's ignition coil, and the transformer. All circuits have some degree of natural self-inductance – even a single conductor has some self-inductance, albeit extremely low compared to that of a coil.
