Explain the process by which a permanent magnet can magnetize and ordinary piece of iron.
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We take a demagnetised piece of iron and place it on the surface of the table. Then we take a magnet and take one of the poles and rub it with the selected pole on the iron in one direction several times. Then after some time, the iron piece will turn into a magnet.
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This method involves simply placing the magnetic material (soft iron) close to a strong magnet without touching. The soft iron bar becomes an induced magnet with the end nearer the magnet having opposite polarity to that of the magnet. Hence, the soft iron bar is attracted and attached to the permanent magnet.
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