Mains electricity is produced using electromagnetic induction where a magnet is moved inside a coil of wires.

In this topic you need to know about the following: -

  • How a microphone works.
  • How split ring commutators are used in a dc generator .
  • How to interpret potential difference/time graphs for ac and dc generators.
  • How ac current is used in a transformer.

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    		 P3.6 - How do electric motors work?