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Force between moving charges

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

    http://img207.imageshack.us/img207/4245/picture2jwi.png [Broken]

    2. Relevant equations

    see picture

    3. The attempt at a solution

    I don't know what is going wrong with part B and I'm running out of attempts! Please help me with that and part C as well.

    Thanks
     
    Last edited by a moderator: May 4, 2017
  2. jcsd
  3. Apr 1, 2009 #2

    LowlyPion

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    F = q2v X B1 = q2v *μo*q1v/(4π*2d2)

    Your distance squared is 2d2 isn't it?
     
  4. Apr 1, 2009 #3

    LowlyPion

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    For part C) consider that

    εoμo = 1/c2
     
  5. Apr 1, 2009 #4
    didn't get it.. one more attempt left..

    http://img17.imageshack.us/img17/3769/picture2zjr.png [Broken]




    and the answer for part C would be: The magnitude of the electric force is greater than the magnitude of the magnetic force. ?
     
    Last edited by a moderator: May 4, 2017
  6. Apr 1, 2009 #5
    anyone?
     
  7. Apr 2, 2009 #6

    LowlyPion

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    I think the problem is that the second charge is moving at an angle to the field generated by the other charge.

    I think the F then is a factor of √2/2 off. (The value of sinθ that v is relative to the B field.)
     
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