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Domestic electricity

OCR J250 — matched to your course.

Mains electricity, plugs and cables, electrical power, energy and household safety.

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Domestic electricity

Tailored to OCR J250.

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Subtopics and study areas

  • Describe UK mains a.c. supply and the roles of live, neutral and earth conductors.
  • Explain the use of step-up and step-down transformers in the National Grid.
  • Explain why high transmission potential differences improve efficiency.
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