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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