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Electromagnetic fields

  1. Jan 6, 2014 #1
    Hello,

    I'm stuck on this question, and it's really annoying me. I scanned the page so it has a bit more context.

    img272_zps27d9afc6.jpg

    It's question 3.7: "A long wire carrying a steady current is placed in a uniform magnetic field parallel to it's own length. What is the shape of the magnetic field lines close to the wire?".

    I approached the problem like this:

    img270_zpsaeb417b8.jpg

    (Sorry about my awful handwriting!)

    I'm close to the answer in the back of the book (which i'll withhold for now) but it still isn't right. Unfortunately, I can't see what i've done wrong.

    I was hoping that someone could point out any gaps in my working.

    Thanks in advance!
     
  2. jcsd
  3. Jan 6, 2014 #2

    rude man

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    I don't see what's wrong with what you did. Maybe you could express r as sqrt(x^2 +y^2) but other than that ...
     
  4. Jan 6, 2014 #3
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