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Homework Help: Direction of the Magnetic Field due to a Wire

  1. Mar 7, 2008 #1
    [SOLVED] Direction of the Magnetic Field due to a Wire

    1. The problem statement, all variables and given/known data

    1013366B.jpg

    Find the magnetic field at point C, D, E.

    The choices are for all 3 are

    i) Out of the page
    ii) Into the page
    iii) Not into the page or not out of the page, and not = 0
    iv) 0

    2. Relevant equations

    The Right Hand Rule for a Straight Wire

    3. The attempt at a solution

    I believe the answer for:

    C - Out of the page
    D - Not into the page or not out of the page, and not = 0
    E - Into the page

    Any help would be appreciated.
     
    Last edited: Mar 7, 2008
  2. jcsd
  3. Mar 7, 2008 #2

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    Think about the individual contributions of I and 2I for point D, and then add up. C and E are correct, even though you didn't give any reason.
     
  4. Mar 7, 2008 #3
    I used the Right Hand Rule for a Straight Wire, I just didnt know how to describe what I did.

    Thank you for the suggestion for D.

    So since I_1 doesnt equal I_2, D can't be 0.

    Since I_2 > I_1, it would have more effect on it, using the right hand rule for a straight wire, D would be coming out of the page
     
    Last edited: Mar 7, 2008
  5. Mar 7, 2008 #4

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  6. Mar 7, 2008 #5
    Thank You for your help.
     
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