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How can iron filings be used to map the magnetic field of a bar magnet?
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34 votes
How can iron filings be used to map the magnetic field of a bar magnet?

User Daniel Corin
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26 votes
putting pieces of irons on a piece of paper,pass the magnet under the paper,and the side which has more iron filling is the north pole and the side which has less iron filling is the south pole.
User Vid
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