What you’ll learn5 learning objectivesChoose one objective for a focused lesson, or study the complete topic.20.5.1Magnetic flux as the product of the magnetic flux density and the• define magnetic flux as the product of the magnetic flux density and the cross-sectional area perpendicular to the direction of the magnetic flux densitySyllabus objective20.5.2Φ = BA• recall and use Φ = BASyllabus objective20.5.3The concept of magnetic flux linkage• understand and use the concept of magnetic flux linkageSyllabus objective20.5.4Experiments that demonstrate: • that a changing magnetic flux can induce an• understand and explain experiments that demonstrate: • that a changing magnetic flux can induce an e.m.f. in a circuit • that the induced e.m.f. is in such a direction• As to oppose the change producing it • the factors affecting the magnitude of the induced e.m.f.Syllabus objective20.5.5Faraday’s and Lenz’s laws of electromagnetic induction• recall and use Faraday’s and Lenz’s laws of electromagnetic inductionSyllabus objective