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

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

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Engineering Materials in EE
The Bohr model of the atom

 could not explain the line spectrum of atoms larger than hydrogen.
 explained the color lines in the hydrogen spectrum.
All of these
 had some made-up rules without explanations.

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