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Dec27-12, 06:06 PM
Sci Advisor
PF Gold
P: 2,080
No, it does make a difference because what happens depends on the orientation of each segment of the loop. Consider a simple case: If the loop lies in a plane that includes the separation vector x-x', then the force is zero. If the plane of the loop is normal to the separation vector, on the other hand, then every bit of wire contributes to the force. For a more general oblique angle or non-planar case, contributions are given by the equation.