What you’ll learn7 learning objectivesChoose one objective for a focused lesson, or study the complete topic.4.2.3.1Electromotive force (e.m.f.) as the• Define electromotive force (e.m.f.) as the electrical work done by a source in moving a unit charge around a complete circuitSyllabus objective4.2.3.2E.m.f. is measured in volts (V)• Know: e.m.f. is measured in volts (V)Syllabus objective4.2.3.3Potential difference (p.d.) as the• Define potential difference (p.d.) as the work done by a unit charge passing through a componentSyllabus objective4.2.3.4P.d. between two points is measured in• Know: the p.d. between two points is measured in volts (V)Syllabus objective4.2.3.5Use of voltmeters (analogue and• Describe the use of voltmeters (analogue and digital) with different rangesSyllabus objective4.2.3.6E.m.f.: E = W/Q• Recall/use e.m.f.: E = W/QSyllabus objective4.2.3.7P.d.: V = W/Q• Recall/use p.d.: V = W/QSyllabus objective