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Magnetic Field at Center of Loop

  1. Mar 11, 2014 #1
    1. The problem statement, all variables and given/known data

    What is the strength of the magnetic field at the center of the loop in the figure?

    See attachment

    2. Relevant equations

    B = Mu_0*I/(2*R)

    3. The attempt at a solution

    I plug in the information to this equation and get .00038 Tesla which is incorrect. Does the magnetic field due to a loop equation I listed above not apply to this problem?
     

    Attached Files:

  2. jcsd
  3. Mar 11, 2014 #2

    mfb

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    The loop is fine, but the cable is not just a simple loop...
     
  4. Mar 11, 2014 #3
    What is special about it?
     
  5. Mar 11, 2014 #4

    mfb

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    Do you see the difference between the shape of the cable and a circle?
     
  6. Mar 11, 2014 #5
    There is some over lap. I thought it still fitted the formula above due to the fact that it is a coil with a single turn.
     
  7. Mar 11, 2014 #6

    BvU

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    I spy with my little eye: a loop and a straight wire carrying a current!
     
  8. Mar 11, 2014 #7
    Using superposition, you will simply added the magnetic field due to the straight wire to the magnetic field due to the loop. Thank you!
     
  9. Mar 12, 2014 #8

    BvU

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    Bravo! and: you're welcome.
     
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