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Q.

The soft-iron is a suitable material for making an electromagnet. This is because soft-iron has :
 

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a

low coercively and high retentively

b

 low coercively and low permeability

c

 high permeability and low retentively

d

high permeability and high retentively

answer is C.

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Detailed Solution

It has high permeability, so that magnetization is large even for a small magnetizing field

Low retentivity, so that material will not retain the magnetic properties

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