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Permanent magnets vs Electromagnet

  1. Oct 27, 2014 #1
    I've been trying to figure this out for hours.. been studying for my final exam. Can somebody please help me?

    Are there any differences between the magnetic field around a permanent bar magnet and electromagnet? Any similarities?
     
  2. jcsd
  3. Oct 27, 2014 #2

    Nugatory

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    Staff: Mentor

    What do you think?
     
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