What are the two reasons for using soft iron | vedclass

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(A) Magnetic retentivity determines the amount of magnetism remaining in a material after the external magnetizing field is removed. For electromagnet

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High permeability and low retentivity

Vedclass · Answer

(A) Magnetic retentivity determines the amount of magnetism remaining in a material after the external magnetizing field is removed. For electromagnets,it is essential that the magnetism vanishes quickly when the current is switched off,which requires low retentivity.Magnetic permeability (related to high susceptibility) determines how easily a material can be magnetized by an external field. High permeability ensures that the material becomes strongly magnetized even with a weak magnetizing field.Therefore,soft iron is preferred for electromagnets because it possesses high permeability and low retentivity.

What are the two reasons for using soft iron as the material for electromagnets?

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