A battery has an electromotive force (e.m.f.) of 6.0 V.
What does this statement mean?
The battery converts 1.0 J1.0\text{ J}1.0 J of energy from chemical to electrical form when driving 6.0 C6.0\text{ C}6.0 C of charge round a complete circuit.
The battery converts 6.0 J6.0\text{ J}6.0 J of energy from chemical to electrical form when driving 1.0 C1.0\text{ C}1.0 C of charge round a complete circuit.
The battery converts 6.0 J6.0\text{ J}6.0 J of energy from chemical to electrical form per second when driving 1.0 C1.0\text{ C}1.0 C of charge round a complete circuit.
The battery converts 6.0 W6.0\text{ W}6.0 W of power when driving 1.0 C1.0\text{ C}1.0 C of charge round a complete circuit.
55 exam-style questions on CIE IGCSE Physics 4.2.3a Electromotive force. Each one has a worked solution and a mark scheme showing where the marks go.