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Three identical iron bars are kept on a table. Two out of three bars are magnets. In one of the magnet the North-South poles are marked. How will you find out which of the other two bars is a magnet? Identify the poles of this magnet.
Keep the magnet with marked poles near the metal bars, such that to it. By , the north pole with marked poles will the north pole of the unknown magnet and vice-versa.
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