Spec 0625
Revise CIE IGCSE Physics 4.2.3b Potential difference and voltmeters with the question bank and revision guides.
Define potential difference (p.d.) as the work done by a unit charge passing through a component • Know that the p.d. between two points is measured in volts (V) • Describe the use of voltmeters (analogue and digital) with different ranges • Supplement: Recall and use the equation for p.d. V = W / Q
