Engineering Materials in EE
What is the name of the fluorescent material that gives red colour fluorescence?

  Magnesium silicate.
 Zinc sulphide.
 Calcium silicate.
 Zinc silicate.

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

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

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