1. The problem statement, all variables and given/known data I am looking at an example problem in the text and they skipped some steps. I think I am missing somthing obvious but none-the-less I don't know what is going on. We have a long copper rod o radius R which carries a uniformly distributed (free) current I. Find H, the auxillary field inside and outside the rod. 2. Relevant equations [itex]\oint H dot dl[/itex] = Free current enclosed 3. The attempt at a solution so the LHS would be (magnitude only) H*2pis for some amperian loop. Now I don't know how to get the Free current enclosed inside and outside the rod. Thanks for your help!