Which property of soft iron makes it useful for preparing electro… - Vidyadip

Question

Which property of soft iron makes it useful for preparing electromagnet?

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Answer

An electromagnet should become magnetic when a current is passed through its coil but should lose its magnetism once the current is switched off. Hence, the ferromagnetic core (usually iron-based) used for an electromagnet should have high permeability and low retentivity, i.e., it should be magnetically ‘soft’.

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