In this chapter you will learn how to: define magnetic flux as the product of the magnetic flux density and the cross-sectional area perpendicular to the direction of the magnetic flux density recall and use understand and use the concept of magnetic flux linkage understand and explain experiments that demonstrate: that a changing magnetic flux can induce an e.m.f. in a circuit that the direction of the induced e.m.f. opposes the change producing it the factors affecting the magnitude of the induced e.m.f. recall and use Faraday’s and Lenz’s laws of electromagnetic induction.