a bar magnet has no markings to indicate its poles.how would you find out near which ends is its north pole located
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Take a bar magnet which has its poles marked. Now take the North pole of the marked magnet to any poles of the unmarked one. The pole which repels is North pole whereas the one which gets attracted is South pole
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Take compass needle. The pole showing defection when North pole of compass is brought near then it's south pole and eventually other one is north
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