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OpenStudy (a1234):
Suppose you make an electromagnet with a copper wire and a battery by putting the two ends of the wire on the two ends of the battery. If you switch the side of the battery, are you changing the magnetic poles of the wire?
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OpenStudy (radar):
I would think so, you have reversed the current. Use the left hand or the right hand rule depending whether you use conventional current or electron flow direction.
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