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Using magnetic energy and causing degradation of the field

  1. Mar 20, 2013 #1
    Hi guys! I was wondering something about magnetic energy and well, I stumbled on to this. If there was a way to use a magnetic field's energy without influencing the actual magnet, would the degradation of the field increase at a faster rate?
  2. jcsd
  3. Mar 20, 2013 #2


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    Staff: Mentor

    Could you maybe give an example to illustrate what you are asking? The question is not very clear yet.

    If you have a permanent bar magnet mounted to the edge of a desk, and you wave a coil of wire in front of the end of it, you will induce a voltage in the coil. That doesn't physically alter the bar magnet...
  4. Mar 20, 2013 #3


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    Science Advisor
    Gold Member
    2017 Award

    This seems to be another of those misunderstandings that people have ... that a magnetic field is stored energy that you can use up

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