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Core of electromagnets are made of ferromagnetic materials which have

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Core of electromagnets are made of ferromagnetic materials which have
A. low permeability and high retentivity
B. high permeability and low retentivity
C. low permeability and low retentivity
D. high permeability and high retentivity
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Correct Answer - B
Core of electromagnets are made up of ferromagnetic material which has high permeability and how retentivity.
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