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Homework Help: RHR for current problem

  1. Oct 19, 2013 #1
    1. A long, straight wire is carrying a current of 5.0 A in the direction shown in the
    figure. The point P is 0.040 m from the wire.
    2ak9pud.jpg





    What is the direction of the magnetic field at point P due to the current in the wire?

    Answer: out of the plane of the page




    I can only see that the current is to the left. I don't understand how to figure out the direction of the magnetic force. :(
     
  2. jcsd
  3. Oct 20, 2013 #2

    rude man

    User Avatar
    Homework Helper
    Gold Member

    Ampere's law.
     
  4. Oct 20, 2013 #3
    That didn't help.
     
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