Q.

The material used for permanent magnets has

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a

Low retentivity, high coercivity

b

High retentivity, high coercivity

c

High retentivity, low coercivity

d

Low retentivity, low coercivity

answer is D.

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Detailed Solution

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Permanent magnet is made up of material which have high coercivity, high retentivity and high permeability so as to retain the magnetisation. 

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The material used for permanent magnets has