Hard steel is suitable for making permanent magnets because

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• Those materials are well suited for making permanent magnets which have retentivity and coercivity.
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• Silicon steel is used in electrical machines because it has
• Hysteresis loop in case of magnetically hard materials is more in shape as compared to magnetically soft materials.
• The working of a meter is based on the use of a permanent magnet. In order to protect the meter functioning from stray magnetic fields
• A permanent magnet
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