Question
Which of the following materials is the most suitable for making the core of an electromagnet?
Answer: Option A
:
A
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A
Soft iron can be used as the core of an electromagnet because it loses all of its magnetism when the current in the coil is switched off. On the other hand, steel retains its magnetism even after the current is switched off.
Brass and aluminium are non-magnetic materials. Hence, they can not be used as the core of an electromagnet.
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