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Homework Help: Electric Currents, Magnetic Fields

  1. May 20, 2008 #1

    Everyone seems to know what magnetic fields are and that they are caused by electric currents, but i can't seem to find a good reason WHY they are caused by lectric currents.

    Thanks, appreciated
  2. jcsd
  3. May 20, 2008 #2
    god knows :) what kind of good reason do you hope? But if you mean HOW, that is easy.
  4. May 20, 2008 #3
    Magnetic force exists thanks to relativistic transformation of electric force. See special theory of relativity to learn more about this.
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