E.m.f. and potential difference

What is E.m.f. and potential difference?

E.m.f. is the electrical work done by a source in moving a unit charge around a complete circuit, while potential difference is the work done by a unit charge passing through a component; both are measured in volts.

This definition is part of the Electricity and Magnetism chapter in Cambridge IGCSE Physics.

Concepts related to E.m.f. and potential difference

• energy transfer
• voltmeter
• sources in series
• potential divider