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Question on a past paper

  1. Aug 24, 2009 #1
    Can anyone help me with this, i have done the first part, whereas i have obtained B using ampere's law. But changing it to A (magnetic vector potential) is proving to be tricky.

    A long straight wire of radius a carries a uniform steady current I. Using the integral
    form of Ampere's law, obtain an expression for the magnetic vector potential A(r)
    at a distance r < a.

  2. jcsd
  3. Aug 29, 2009 #2
    You should clarify what magnetic potential is, I mean, nowadays it is not used .

    It may be similar to magnetic field B so keep on trying what you first did.

  4. Aug 29, 2009 #3

    Vanadium 50

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    What do you mean that the magnetic potential is not used? Sure it is.

    That said, this really needs to go into the homework section.
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