Chapter 40, Problem 8Q

Figure 40-22 shows three points at which a spin-up electron can be placed in a nonuniform magnetic field (there is a gradient along the z axis). (a) Rank the three points according to the energy U of the electron’s intrinsic magnetic dipole moment ${\stackrel{\to }{\mu }}_s$, most positive first. (b) What is the direction of the force on the electron due to the magnetic field if the spin-up electron is at point 2?

Figure 40-22 Question 8.