Q64
Pick out the wrong statement.
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
AnswerAnswer: Option D
Solution
Answer: Option D
No explanation is given for this question Let's Discuss on Board