4.2.3 — Electromotive force and potential difference

Core

• 4.2.3.1 — Define e.m.f. as electrical work done per unit charge by a source
• 4.2.3.2 — Know that e.m.f. is measured in volts
• 4.2.3.3 — Define potential difference (p.d.) as work done per unit charge through a component
• 4.2.3.4 — Know that p.d. is measured in volts
• 4.2.3.5 — Describe the use of voltmeters (analogue and digital) with different ranges

Supplement

• 4.2.3.6 — Recall and use E = W/Q
• 4.2.3.7 — Recall and use V = W/Q