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Biot-Savard law

  1. Oct 16, 2008 #1
    1. The problem statement, all variables and given/known data


    A single piece of wire is bent so that it includes a circular loop of radius a. A current I flows in the direction of the x axis . Find an expression for the magnetic field at the center of the loop.
    2. Relevant equations



    3. The attempt at a solution
    This is a problem involving the integrated Biot-Savard law
     
  2. jcsd
  3. Oct 16, 2008 #2

    Hootenanny

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    You are correct, the Biot-Savart law is the way to go.
     
  4. Oct 16, 2008 #3
    well i can't find the right expression.
     
  5. Oct 16, 2008 #4

    Hootenanny

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    What have you tried?
     
  6. Oct 16, 2008 #5
    this is what i have: (mu_0IL)/(4pia2) with a being the radius and mu_0 being the permeability constant
     
  7. Oct 16, 2008 #6

    Hootenanny

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    Looks correct to me. However it can be simplified by noting that [itex]L = 2\pi a[/itex].
     
  8. Oct 16, 2008 #7
    well i am using a web software and the response you and i agreed on is not the right one. In the picture, the current I comes from the left in the x axis goes in a circular motion and continues in the x axis again.
     
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