Q.

Select the correct statement

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a

Retentivity of soft iron is less than that of steel.

b

Hysteresis loss per cycle per unit volume of soft iron is less than that of steel.

c

Coercivity of soft iron is less that that of steel.

d

Both (2) and (3) are correct.

answer is D.

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Detailed Solution

Retentivity of soft iron is more than that of steel but coercivity of soft iron is less than that of steel, so option (3) is right. Again B-H curve of soft iron is very narrow and area enclosed by B-H curve is less than that of steel. Hence option (2) is also right.
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Select the correct statement