# Rectangular Current Loop

1. Feb 24, 2017

### marchcha

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.
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. Feb 24, 2017

### TSny

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.

3. Feb 24, 2017

### marchcha

I'm a little confused on how to find the angle that the vector maxis to the x-axis.

4. Feb 24, 2017

### TSny

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