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Aim :to find experimentally that earth big magnet

materials required : a bar magnet, string, stand 


1. take a bar magnet and determine their magnetic north and south poles 
2. take the bar magnet and tie it with a string to bar magnet and the stand and leave it freely suspended and observe

observation :
we can observe that magnetic south and north align with the north direction and south direction which shows that earth is a kind of magnet

result :
hence we can say that earth is a big magnet

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