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State, briefly, an efficient way of making a permanent magnet. Write two properties to select suitable materials for making permanent magnets. |
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Answer» Solution :If an iron rod is burried inside the earth, along the north-south-direction. After some days, the rod becomes a magnet. ITIS possible only when the earth itself behaves like a magnet. The two properties of permanent magnet are as : (i) Its RETENTIVITY is very HIGH. (II) Its hysteresis loss is very high. |
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