Hello ! I am using Comsol Multiphysics in order to simulate the eddy currents in a damaged/cracked steel circular rod, with a helix coil surrounded it and thus creating the alternativ magnetic field. Actually, I am having a lot of problem in modelling it, mainly because I am new in using Comsol. My first goal is to model the coil and put an alternativ current in it. I managed to model a spring coil in Solidworks and import it in Comsol. But i cannot find how to put a current through the material in order to simulate the coil, like we can use it in a laboratory... I guess, I have to do some things adding Physics, AC/DC, in the model. But what exactly ? It would be incredible if you could help me, and guide me through my simulation. I need it in order to support my work about Eddy current testing. Of course, I would quote you as helpers and contact in my final work/report if you want.