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Electromagnets are made of soft iron because soft iron has:

1. low retentivity and high coercive force
2. high retentivity and high coercive force
3. low retentivity and low coercive force
4. high retentivity and low coercive force

Correct answer: low retentivity and low coercive force

Solution

Soft iron is used in electromagnets because it has low retentivity and low coercive force, allowing it to magnetize and demagnetize quickly, which is essential for efficient operation.

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