from the point of a learner, it will make learning relational when it is possible for the the learner to verify the equation of motion of a charged particle in B field.
F = v^B*q
in the case of a constant velocity and in a circular motion case
F = m*v*v/r
v^B*q = m*v*v/r
B*q = m*v/r
make B, r, m, v measurable helps the learner to understand the equation is really a suitable model to predict the motion.
has some interesting features you may take reference from :)