First slide

Magnetic properites of materials.

Question

Two reasons for using soft iron as the material for electromagnets…..

Easy

A

high permeability and low retentivity
B

low permeability and low retentivity
C

high permeability and high retentivity
D

low permeability and high retentivity

Solution

Soft Iron loses most of the magnetism when current is switched off in the coils wound around it.
Soft Iron also has Low retentivity.

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