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Magnetic Field Due to a Circular Loop

  1. Oct 14, 2004 #1
    "A conductor consists of a circular loop of radius .0584 m and straight long sections. The wire lies in the plane of the paper and carries a current of 9.68 A.

    Determine the magnitude of the magnetic field at the center of the loop. Answer in units of T."


    Perhaps im not taking into account the long straight sections, but i believed that they did not affect the mag field at the center of the loop, correct?


    using B = (u*I)/(2*pi*r), i got an incorrect answer. is this formula incorrect?
  2. jcsd
  3. Oct 14, 2004 #2

    Claude Bile

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    The formula you used applies for a straight wire and is thus incorrect.

    You need to modify your formula by multiplying by the total length of wire around the loop.

  4. Oct 14, 2004 #3


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    You might want to recall what you learned about Biot-Savart.
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