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Computer Science Fundamentals System Design Objective
May 13, 2013

Pick out the wrong statement.

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

Option A is correct .

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