For a permanent magnet,which of the following | vedclass

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(B) permanent magnet must retain its magnetism even in the presence of external demagnetizing fields. Retentivity is the ability of a material to reta

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High coercivity

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(B) permanent magnet must retain its magnetism even in the presence of external demagnetizing fields. Retentivity is the ability of a material to retain magnetism after the external field is removed,which should be high. Coercivity is the measure of the resistance of a ferromagnetic material to becoming demagnetized. For a permanent magnet,the material must be magnetically hard,meaning it should have high retentivity and high coercivity to prevent easy demagnetization. Therefore,high coercivity is a fundamental requirement.

For a permanent magnet,which of the following properties is essentially required?

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