1. The problem statement, all variables and given/known data Hi I have a current loop (see attached), and I have found the expression for the B-field along the axis of the loop. A particle moves through the loop, as also shown in the attached picture. Using the right hand, I let current run through the loop counter-clockwise, shown as well. My question is, what is the sign of the B-field that the particle experiences? My own attempt is the following: So I know that the particle moves in the positive z-direction. Since the magnetic field Bz points towards -z, then the particle experiences a negative magnetic field. Is my resoning correct? Best, Niles.