Domestic electricity

3 lessons in Electricity.

27 exam questions · 65 marks

2.10 Mains electricity and plugs Direct and alternating potential difference, UK mains electricity, the wires in a three-pin plug, and how fuses, earthing and circuit breakers keep users safe. AQA Edexcel OCR 9 questions 2.11 Electrical power and energy in the home Electrical power and energy: P = IV, P = I^2 R, E = Pt and kilowatt-hours, appliance power ratings and the heating effect of a current. AQA Edexcel OCR 9 questions 2.12 The National Grid How the National Grid transfers electrical energy from power stations to homes, and why step-up and step-down transformers reduce energy wasted in the cables. AQA Edexcel OCR 9 questions