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प्रश्न
You are given two similar bars; one is a soft iron and the other is a magnet. How will you distinguish between them without using any other magnet or bar?
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उत्तर
Suspend the iron bar and magnet freely in the space by using thread. And, move them here and there a few times. The bar which always points in north-south direction after coming to rest is a magnet and the other bar is the iron bar.
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