the surest test for magnestism in a test for
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Repultion and attraction
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=>Repulsion is the surest test of the magnets, because a magnetic substance also has attractive property......
=> Attraction can be caused either by opposite poles of magnets or between one pole of magnet and an unmagnetised bar of iron whereas repulsion is possible between the two similar poles of magnets. Hence, repulsion is the surest test of magnetism.
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