First slide

Magnetic properites of materials.

Question

The material suitable for making electromagnets should have

Moderate

A

high retentivity and high coercivity
B

low retentivity and low coercivity
C

high retentivity and low coercivity
D

low retentivity and high coercivity

Solution

Electromagnets are made of soft iron which have low retentivity and low coercivity.
so that the substance can be easily magnetised and demagnetised in both directions.

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