Hello, I have a question. I would like to create an electromagnet that is generally stronger than a standard fridge magnet... Right now I have this set up, (please tell me if what Im doing is wrong or unpractical). I have 10 AA batteries ligned in parallel to a 3 inch iron nail. I spliced a telephone wire (to get the 4 isolated copper wires) and I rapped around 10 meters worth of copper wire around the nail. Then stripped the ends and connected it with the batteries. However this doesn't seem to good. Is there a better way? Thanks!