Core of electromagnets are made of ferromagnetic material which have
A
low permeability and low retentivity
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B
high permeability and high retentivity
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C
high permeability and low retentivity
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D
low permeability and high retentivity
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Solution
The correct option is D high permeability and low retentivity Core of electromagnets are made of soft iron that is a ferromagnetic material with high permeability and low retentivity.