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Moment that is affecting a ring

  1. Oct 23, 2012 #1
    1. The problem statement, all variables and given/known data

    A 20 A current is flowing through a ring. Ring's diameter is 30 cm.
    What is the value of the Moment that is affecting the ring?

    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Oct 23, 2012 #2

    CWatters

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    Is the ring in a magnetic field? The earths magnetic field?
     
  4. Oct 23, 2012 #3
    There's no mention of any outside magnetic field. So I'm assuming the ring's magnetic field is creating the Moment.
     
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