Engineering Materials in EE
In ferromagnetic materials

 the constituent is only iron.
 one of the constituent is iron.
 the atomic magnetic moments are parallel.
 the atomic magnetic moments are antiparallel and unequal.

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Engineering Materials in EE
Which statement is not true of ferromagnetic materials.

  They have fixed value of μr.
 They have large magnetic susceptibility.
 They lose their nonlinearly property above the Curie temperature.
 Energy loss is proportional to the area of hysteresis loop.

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