chajakedude
New Member
i know the basic theory behind electromagnets, but i was wondering if there was any way to relate strength of magnetic field created to the current put throught the coil of wire. like if i wanted a field to hold up a 10 lb weight, how much current would have to go through the wire? i know there are many variables but is there an equation or 5 that i have to use to figure this out? thanks to all who respond or read.