Compute the vector magnetic potential within the outer conductor for the coaxial line whose vector magnetic potential

Question:

Compute the vector magnetic potential within the outer conductor for the coaxial line whose vector magnetic potential is shown in Figure 7.20 if the outer radius of the outer conductor is 7a. Select the proper zero reference and sketch the results on the figure.

Figure 7.20

Hol л 2л 3 4 pla A, (Wb/m)