I have a problem conceptualizing the law of motion for the electromagnetic field in the case of the alternating current. Describing this conundrum takes too much time and a mix of too many ideas, so I thought about a problem that would encompass all that in a short and simple manner. I think this problem does just that, but even though I put the problem together I still can't figure out the solution and give the proper explanation for it. There seems to be two possibilities here, the lack of theoretical knowledge is stopping me from coming up with the right solution. The problem is in the attached .pdf file. Any help would be greatly appreciated! Thanks, Diegis.