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12 year old simple question. (seriously)

  1. Feb 6, 2010 #1
    1. The problem statement, all variables and given/known data

    Why does a superconductor have a greater magnetic field because of
    a. its interior has no magnetic field
    and b.it has no electrical resistance

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  2. jcsd
  3. Feb 6, 2010 #2

    ideasrule

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    But a superconductor doesn't have a magnetic field. It actively tries to counteract any changes in the magnetic flux passing through it, leading to the Meissner effect.
     
  4. Feb 6, 2010 #3
    By Ampere's law, is not the magnetic field produced by a conductor proportional to the current through it? Would not then a superconductor have a bigger magnetic field compared to a regular conductor due to the lack of electrical resistance?
     
  5. Feb 6, 2010 #4

    ideasrule

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    If you connect the superconductor to the same power source, yes, since you'll certainly short out the power source and make it deliver the maximum amount of current it can manage.
     
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