Engineering Materials in EE
The temperature beyond which substances lose their ferroelectric properties, is known as

 inversion temperature.
 critical temperature.
 conversion temperature.
 curie temperature.

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

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

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