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Help with understanding of magnetic fields related to moving electrons

  1. Jun 10, 2013 #1
    Hello all,

    I am in need of understanding of magnetic fields. More specifically i was wondering exactly why there is a magnetic field around a wire with current moving through it. Where i am going with this is.. if i had plasma contained, and i managed to get it moving in the container, would there be a magnetic field around the moving plasma similar to a moving current?
  2. jcsd
  3. Jun 10, 2013 #2


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    Science Advisor

    I'm not sure in what sense you are using the word "why". The presence of the stationary current along the wire must produce a non-vanishing ##B## field solving Ampere's Law for magnetostatics ##\nabla \times B = \mu_{0}j##.
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