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Homework Help: Wires and potential difference

  1. Mar 16, 2010 #1
    Recently in physics I've learned that equipotential surfaces are always conductors in electrostatic equilibrium.. so no moving charges. I'm a little confused, then, of how a wire carrying current is considered an equipotential? If charges are moving how can the potential be constant?
  2. jcsd
  3. Mar 16, 2010 #2


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    Homework Helper

    The charges always move from higher potential to the lower potential. On the equipotential surface, at every point the potential is the same. so the charges are not moving.
    In a wire current flows only when there is a potential difference at two ends of the wire.
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