Soft iron is preferred over steel in making electromagnets because ___________________

low permeability, high retentivity

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high permeability, high retentivity

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high permeability, low retentivity

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low permeability, low retentivity

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Solution

The correct option is C
high permeability, low retentivity

1. high permeability, so that magnetization is large even for a small magnetizing field

2. low retentivity, so that material will not retain the magnetic properties

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