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How to test for polarity of am magnet
Testing for polarity of a pole
A known pole of magnet is brought near the ends of a material suspected to be a magnet. If repulsion occurs then that end of material is a like pole. The poles of a given magnet or magnetized material are tested by repulsion occurring between poles of a known magnet and that of the material whose polarity is to be tested.
NB: Repulsion is a sure test for polarity because repulsion only occurs due to like poles of magnets. While attraction is not a sure test because attraction can either result from unlike poles of magnets or from magnet and Ferromagnetic material which is not magnetized.
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