Q.

Electromagnets are made of soft iron because soft iron has

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a

low retentivity and high coercive force

b

high retentivity and low coercive force

c

low retentivity and low coercive force

d

high retentivity and high coercive force

answer is C.

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Detailed Solution

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Soft iron has a very narrow hysteresis loop which means it has low retentive and coercive forces, which makes it easier for magnetising and demagnetising it. 

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