Electromotive force and potential difference (4.2.3) | Cambridge IGCSE (9–1) Physics 0972 (Extended) (2026–2028) | KnowledgeSet

Electromotive force and potential difference

Physics · IGCSE · Cambridge · Cambridge IGCSE (9–1) Physics 0972 (Extended) (2026–2028) · Specification point · 4.2.3 · Electricity and magnetism · Electrical quantities

Electromotive force

Potential difference

Using a voltmeter

Next Steps

Read Notes

Read clear notes for this topic.

Exam Questions

Coming soon

Flashcards

Flip through flashcards to lock it in.

Lesson

Coming soon

Ask Sage

Get help from Sage on this topic.

Learning Objectives

4.2.3 Electromotive force and potential difference

Core	Supplement
$1 Define electromotive force (e.m.f.) as the electrical work done by a source in moving a unit charge around a complete circuit 2 Know that e.m.f. is measured in volts (V) 3 Define potential difference (p.d.) as the work done by a unit charge passing through a component 4 Know that the p.d. between two points is measured in volts (V) 5 Describe the use of voltmeters (analogue and digital) with different ranges$	$E = \frac{W}{Q}$

Core

Supplement

1 Define electromotive force (e.m.f.) as the electrical work done by a source in moving a unit charge around a complete circuit 2 Know that e.m.f. is measured in volts (V) 3 Define potential difference (p.d.) as the work done by a unit charge passing through a component 4 Know that the p.d. between two points is measured in volts (V) 5 Describe the use of voltmeters (analogue and digital) with different ranges

E = \frac{W}{Q}