I am interested in building electric magnets. I have tried without success to find equations on what will make a stronger magnet. If I double the number of wraps, will the magnet be twice as stong? If I double the volts, will this make the magnet twice as strong? Does the type/gauge of wire impact the strength of the magnet? I have built a few simple magnets to date and they work, but now I am interested in building even stronger magnets but I am not sure what I can do to maximize the strength. Any thoughts or links would be greatly appreciated. Thanks!