How do I get better "magnetic pulling power" with a coil? How many turns, what current, what voltage, what coil measures, what type of wire and how thick? (Yeah you guessed right, I'm not an expert in electromagnetics.)
by 
Fluffdragon
ANSWERS: 1
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Well, basically you have to balance how much power you can pump into it, vs. how thick the wire is and how many turns you use. The more the turns, the more magnetic field (for the same current). However, the more the turns, the more the resistance for the same wire thickness and therefore will cut down on the current for the same voltage applied. Also, the more the turns, the more difficult it's going to be to get rid of the waste heat because the inner turns are insulated from the air by the outer turns. There's no one magic set of turns, thickness, current etc. which is going to be perfect. It's a balancing thing. This is why there's no one electromagnet design.
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