Let's say we have a 4-sided loop. Is the magnetic moment different for each side?
The magnetic moment is a property of the loop as a whole (m=I*a). Technically, you could get the contribution from each side to the total moment, but since each side is the same (I'm assuming), this will just be 1/4 of the total.
What about the direction?
Same direction, 1/4 the magnitude. Think about the symmetry.
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