1. The problem statement, all variables and given/known data I have an assignement in school. The statement is: chose a distribution of electric curents for which you can calculate easily the magnetic field (for example, using Ampère's law). Describe your distribution and explain the way you calculate the magnetic field. 2. Relevant equations 3. The attempt at a solution I think that I have to find H. For example, if i chose k=1 (one electric current), and a value for I_1 then i'll have to calculate H from the first integral, but I don't know how. This is just my opinion, I'm not even sure if those are the right equations to solve this because the statement seems a little bit vague to me and I'm unfamiliar with this topic.