Recent content by bks008

Thanks for the help with the first part. I'm embarrassed I didn't see that before. As for the second part, if I add a ferromagnetic core (loosely quoting wikipedia), then the same equation holds true as long as I take into account the permeability of the core.

I'm trying to use some home-made electromagnets to lift a small object. I am a college student, but this is a personal project, so while I may reference something from a textbook, its not a homework problem. I know that I can get some iron bar, coil it with wire, run some current through it...