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A. A ferromagnetic material becomes paramagnetic above the ‘Curie temperature’
B. Permanent magnets are made of hard materials, whereas electromagnets require soft magnetic
materials
C. Soft magnetic materials (e.g., pure iron) have higher permeability and low hysterisis loss and
coercive forces
D. Tungsten steel and alnico are not hard magnetic materials

Correct Answer: Tungsten steel and alnico are not hard magnetic materials

Last Updated: February 10, 2019