what is the surest test of magnetism class 6 answer
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Repulsion
Answer: Repulsion is the surest test of magnetism. Because a magnet can attract a magnet as well as another magnetic substance but it can only repel a magnet, not any magnetic substance. Hence, if one end of iron bar is repelled by the north pole of a bar magnet then it's surely a magnet.
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Sol. This is because, Repulsion takes place only between two likes poles of a magnet whereas attraction takes place between two unlike poles of a magnet and also between a magnet and a magnetic material. So by attraction it cannot be surely identified the substance is a magnet or not. So, repulsion is the sure test of magnetism.
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