why we should use battery, nail,copper wire and paper clip when doing a electromagnets?
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why we should use battery, nail,copper wire and paper clip when doing a electromagnets?
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the nail picked up the paper clip this time because you had magnetized it by exposing it to the magnetic field of the current running in the wire. But without the nail inside it, the wound wire still didn’t produce enough of a magnetic field to pick up the paper clips.