Discussion :: Chemical Engineering Basics
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Pick out the wrong statement.
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A.
A ferromagnetic material becomes paramagnetic above the 'Curie temperature'.
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B.
Permanent magnets are made of hard materials, whereas electromagnets require soft magnetic materials.
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C.
Soft magnetic materials (e.g., pure iron) have higher permeability and low hysterisis loss and coercive forces.
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D.
Tungsten steel and alnico are not hard magnetic materials.
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Answer : Option D
Explanation :
No answer description available for this question.
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