1. The problem statement, all variables and given/known data I'm not sure how they got the components of the B-field in the r and θ direction. I know the B-field along the ∅ direction is zero though. 3. The attempt at a solution Here I have found the B-field at points P, Q and S that are very far along the z, x and y axis. But what about the field at point R, angle θ to the magnetic moment? How do the Bz,∞, By,∞ and Bx,∞ components contribute?