please explain why?

Asked by  | 22nd Nov, 2009, 12:10: PM

Expert Answer:

Soft iron has less retentivity so it acquires the magnetic properties only when the current flows through the coil wound on it and loses the magnetic properties as the current is switched off.

It also intensifies the magnetic field of the electromagnet because of its high permeability.

Answered by  | 22nd Nov, 2009, 01:17: PM

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