Notes

1The energy in a magnetic field in a volume dV is given by W = [0.5 \,\textstyle\int {\bf H} \cdot {\bf B} \, {\rm d} V] = [0.5 \textstyle \int B^2/\mu_0 \, {\rm d}S \, {\rm d}l.] The resulting force is F = dW / d l = [(2 \mu_0)^{-1} \textstyle\int B^2 \, {\rm d} S,] and the pressure is P = dF /dS = [\langle B \rangle^2 / (2 \mu_0)] = [B^2_{\rm max} /(4 \mu_0)], which is equivalent to (2[link]) in SI units.