A) Soft iron
B) Steel
C) Alnico
D) Copper
Correct Answer: A
Solution :
Option (a) is correct Explanation: Soft Iron gets magnetized faster but loses its magnetism as soon as the current stops flowing in solenoid. Hence soft iron is said to have high susceptibility but low retentivity. This property of soft iron makes it suitable for core of electromagnets where we need strong but temporary magnetism as long as current is flowing.
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