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How effective would an electromagnet made from a transformer be at moving a small magnetic ball/neodynium spherical magnet 1and a half inches away? 39cm round abouts. Most electromagnets i have made so far using an iron nail and 36awg wire(wound maybe a thousand or 2 turns around a straw that fit around it) would be able to move the magnet successfully half an inch away, but not any further.
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