I have magnet wire and I have steel with extremely high iron content. I was just wondering, if I were using the same amount of wire and metal no matter how I built it and I were just making a straight cylindrical electromagnet, what would be the more powerful design? More towards the short and wide cylinder or more of a thin and long cylinder? Or is there some intermediate ratio that works better? If so, are the any suggestions for that general ratio? Or are these dimensions completely unimportant to the power of the magnet?