- Calculate the magnetic fields generated by a set of coaxial circular current loops.
- ref:
[1] Jackson, Thrid edition, eq. (5.38)
[2] Simple Analytic Expressions for the Magnetic Field of a Circular Current Loop, James Simpson et al
https://ntrs.nasa.gov/api/citations/20010038494/downloads/20010038494.pdf
notice: In Jackson's book, eq.(5.37) is wrong. For elliptic function on the numerator, they should be E(k**2) and K(k**2), but not the E(k) and K(k). Ref[2]'s work is right.