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Mains electricity, the National Grid and static

Direct and alternating current, the three-core cable and plug, electrical power and energy, the cost of electricity, the National Grid and transformers, and static charge and electric fields.

Start: Direct and alternating current, and the mains supplyAbout 20 min, free

Lessons

  1. Direct and alternating current, and the mains supply Free
  2. Electrical power, P = VI and P = I²R Free
  3. Energy transferred, kilowatt-hours and cost
  4. The National Grid and transformers
  5. Static electricityPhysics only
  6. Electric fieldsPhysics only

Practise and test

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