What you’ll learn10 learning objectivesChoose one objective for a focused lesson, or study the complete topic.4.3.2.1Current at every point in a series• Know: the current at every point in a series circuit is the sameSyllabus objective4.3.2.2How to construct and use series and• Know how to construct and use series and parallel circuitsSyllabus objective4.3.2.3Combined e.m.f. of several sources in• Calculate the combined e.m.f. of several sources in seriesSyllabus objective4.3.2.4Combined resistance of two or more• Calculate the combined resistance of two or more resistors in seriesSyllabus objective4.3.2.5That, for a parallel circuit, the• State that, for a parallel circuit, the current from the source is larger than the current in each branchSyllabus objective4.3.2.6Combined resistance of two resistors• State: the combined resistance of two resistors in parallel is less than that of either resistor by itselfSyllabus objective4.3.2.7Advantages of connecting lamps in• State the advantages of connecting lamps in parallel in a lighting circuitSyllabus objective4.3.2.8Circuit rules: (a) current into a• Recall/use circuit rules: (a) current into a junction equals current out (b) total p.d. across series components equals the sum of their p.d.s (c) p.d. across parallel branches is the sameSyllabus objective4.3.2.9The sum of the currents into a• Explain that the sum of the currents into a junction is the same as the sum of the currents out of the junctionSyllabus objective4.3.2.10Combined resistance of two resistors• Calculate the combined resistance of two resistors in parallelSyllabus objective