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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."

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    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?

    Anyway,

    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.

    Claude.
     
  4. Oct 14, 2004 #3

    Tide

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