I'm confused as to wither or not magnetic fields do work. From reading the forums, as well as my textbook and online resources there seems to be conflicting answers. We talk about magnetic energy, and how work relates to change in energy but then I hear that magnetic fields do no work. Could someone please clarify this for me. Thank you :) ps. My question stems from reading about so called free-energy devices that use magnetic fields. I was trying to debunk them by stating that according to my textbook magnetic fields do no work, but as I looked into it I kept seeing that I was really confused on the matter and I believe it stems from my confusion over terms.