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I Are these instances of identical magnetic fields?

  1. Oct 30, 2018 #1
    Are both magnetic fields emanated from an electromagnet fed with a current spike from a charge capacitor and a rotating static magnetic feild from permanent magnets instances of time varying fields?

    The permanent magnet would be attached to perhaps some rotating disc thus passing over a target were as an electromagnet can stay over the target and is a magnet only when the capacitor discharges thru it. Does the rotating permanent magnet induce eddy currents?
  2. jcsd
  3. Oct 30, 2018 #2


    Staff: Mentor

    How can it be rotating and static at the same time?
    It depends on how it rotates, in general yes.
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