Electrical Power, Energy and Household Circuits

Physics (Science Paper 1) · Chapter 9 · 4. Electricity and Magnetism

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Your path through this chapter

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Visual lesson Beta
1. Part 1: Power, energy and bills15 slides
2. Part 2: Wiring and safety16 slides
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Notes Beta
6 sections with key terms, formulas and exam tips.
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Flashcards Beta
30 cards for quick recall of key terms and facts.
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Practice
68 board-style questions with instant checks: Multiple choice 21, Short answer 15, Numerical 8, Fill in the blanks 7.
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Chapter test Free
Short and long chapter tests in board pattern, with results and analysis.
- Chapter test (long) — Electrical Power, Energy and Household Circuits · 40 marks · 60 min
- Chapter test (short) — Electrical Power, Energy and Household Circuits · 20 marks · 30 min
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Electrical energy W = QV = VIt = I^2Rt = (V^2/R)t and power P = VI = I^2R = V^2/R
Commercial unit kW h; household consumption and electricity bills
Power distribution and house wiring: live, neutral and earth; ring main system; main switch, fuse and MCB
Two-way (staircase) switch; three-pin plug and socket; earthing; colour coding of wires; safety precautions