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Rectangular Current Loop

  1. Feb 24, 2017 #1
    1. The problem statement, all variables and given/known data
    A rectangular loop of wire with sides H = 22 cm and W = 77 cm is located in a region containing a constant magnetic field B = 0.82 T that is aligned with the positive y-axis as shown. The loop carries current I = 334 mA. The plane of the loop is inclined at an angle θ = 30° with respect to the x-axis. h13_rectangle.png
    What is μx, the x-component of the magnetic moment vector of the loop?
    2. Relevant equations
    μ = AI
    A = H*W
    3. The attempt at a solution
    I attempted to solve the question by solving for μ like μx = H*W*cos(30°) however this is not the correct answer. Thanks in advance!
     
  2. jcsd
  3. Feb 24, 2017 #2

    TSny

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    Be sure you draw the magnetic moment vector on your diagram and carefully note the angle that the vector makes to the x-axis or the y-axis.
     
  4. Feb 24, 2017 #3
    I'm a little confused on how to find the angle that the vector maxis to the x-axis.
     
  5. Feb 24, 2017 #4

    TSny

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    What is the rule for determining the direction of the magnetic moment vector?
     
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