An electrochemical cell supplies energy to charge carriers in a circuit. The electromotive force (e.m.f.\text{e.m.f.}e.m.f.), E\mathcal{E}E, of the cell is defined as the work done per unit charge in driving charge around a complete circuit.
What is the unit of E\mathcal{E}E expressed in SI base units?
kg m2 s−3 A−1\text{kg}\ \text{m}^2\ \text{s}^{-3}\ \text{A}^{-1}kg m2 s−3 A−1
kg m2 s−3 A−2\text{kg}\ \text{m}^2\ \text{s}^{-3}\ \text{A}^{-2}kg m2 s−3 A−2
kg m s−3 A−1\text{kg}\ \text{m}\ \text{s}^{-3}\ \text{A}^{-1}kg m s−3 A−1
kg m2 s−2 A−1\text{kg}\ \text{m}^2\ \text{s}^{-2}\ \text{A}^{-1}kg m2 s−2 A−1
26 exam-style questions on OCR A A Level Physics Energy, power and resistance, covering Circuit symbols, E.m.f. and p.d, Resistance, Resistivity, and Power. Each one has a worked solution and a mark scheme showing where the marks go.