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Magnetic field, semi-circle

  1. May 22, 2009 #1
    1. The problem statement, all variables and given/known data

    Part of a long wire is bent into a semicircle of radius a, as in the figure . A current I flows in the direction shown.
    a.)Use the Biot-Savart law to find the magnitude of the magnetic field at the center of the semicircle (point P).

    b.) Find the direction of the magnetic field at the center of the semicircle (point P).

    The magnetic field is directed to the right.
    The magnetic field is directed to the left.
    The magnetic field is directed into the page.
    The magnetic field is directed out of the page.

    2. Relevant equations
    RW-26-62.jpg


    3. The attempt at a solution
    I tried multiple attempts but im not sure what im doing wrong, can someone help??
     
  2. jcsd
  3. May 22, 2009 #2

    diazona

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    Homework Helper

    We can't tell you what you're doing wrong if you don't show us what you did...
     
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