ok that's a big help, here's some more specific questions.
1. what kind of material should i use to wrap the electromagnet?
2. where can i find enameled magnet wire?
3. what's the best way to switch the polarity of an electromagnet extremely quickly?
1. is insulated wire ok to use on an electromagnet?
2. say you have an electro magnet in the form of a spool of wire with an iron core, would it be possible to wrap the entire assembly in a material that would contain the magnetic field produced by the current flow?
3. what is the strongest...