Jackson 6.5c

shehry1

1. The problem statement, all variables and given/known data
I need some guidance concerning Jackson 6.5c. Specifically I cannot get the -1/3 factor that the statement says I should.

2. Relevant equations
Solutions to part a and b which are given in the problem statement.


3. The attempt at a solution
-I started from the volume integral of the curl of (phi * H)
-Introduced a potential of the form: Ez.
-and by a succession of vector identities given on the cover of Jackson along with equation 6.108 was able to come to [E x (volume integral) (z x J)].

Now:
-How can I convert the volume integral to m so that I get the right factors.
-I tried to use the method on page 185 but without luck.

Thanks for your help in advance