Hello everyone. I'm glad to be part of the Physics Community, I've read a lot of interesting threads, and I think now i'm ready to be party of it! For my project, I'm trying to create a ElectroMagnet using a Car Battery. The specifications for this battery are.. 12V 390A 65 RC - What does this mean? 43 AH - What does this mean? As you can see, I have no idea what those two mean, so any info would be nice :) Looking on amazon.com for some wire for my electromagnet, I searched a post before saying I would need at least 404ft of wire. I don't want to short circuit the battery, so I think that might be enough? Also a question. I came across this on amazon: https://www.amazon.com/Fi-Shock-WC-...?s=home-garden&ie=UTF8&qid=1321110814&sr=1-3" Would it be possible to use Steel wire than copper wire? Or would copper wire be the only option? I'm thinking around £10-16 maximum i'm willing to spend. Any help would be appreciated. - Owen.