A permanent magnet and an electromagnet can influence each other. This effect is called the motor effect.

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

  • How to use Fleming’s left hand rule.
  • What factors influence the size of a magnetic force.
  • How motors have been designed using what we understand from the motor effect.
  • Be able to use the equation Force = magnetic flux density x current x length of conductor

    • Use the arrows below to continue to revise.

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    		 P3.4 - What are magnetic fields?