Revision questions on Mains Electricity for AQA GCSE Physics

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Questions

  1. How are most electrical appliances connected to the mains?
  2. What colour is the insulation covering on the live, neutral and Earth wire?
  3. What is the purpose of the live wire?
  4. What is the purpose of the Neutral Wire?
  5. What is the purpose of the Earth Wire?
  6. What potential is the Earth wire at?
  7. What is the potential difference between the live and Earth Wire?
  8. What is the potential of the neutral wire?
  9. What is the potential of the Earth wire and when does it carry a current?
  10. Why is the live switch dangerous even if there is an open switch?
  11. Why is it dangerous to make a connection between the Earth and the Live wire?

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