A student wants to charge a rechargeable cell. A low-potential-difference phone charger and a generator are available.
Which choice is suitable for charging the cell?
Use the generator, because its output is direct current.
Use the generator, because its output is alternating current.
Use the phone charger, because its output is alternating current.
Use the phone charger, because its output is direct current.
81 exam-style questions on Edexcel GCSE Physics 10.4 Mains electricity, covering 10.4.1 Direct and alternating current, 10.4.2 Live, neutral and earth wires; safety, 10.4.3 Mains wire potential differences and dangers, and 10.4.4 Power ratings and energy use. Each one has a worked solution and a mark scheme showing where the marks go.