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Engineering Materials in EE

Engineering Materials in EE
What are insulating materials that can tolerate maximum temperature?

 All of these.
 Mica.
 Glass.
 Porcelain.

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Engineering Materials in EE
The permanent magnets are made from which of following materials ?

 Soft iron.
 Paramagnetic.
 Diamagnetic.
 Ferromagnetic.

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

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

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Engineering Materials in EE
The magnetisation and applied field in ferromagnetic materials are related

 linearly.
 sinusoidally.
 parabolically.
 non linearly.

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Engineering Materials in EE
The atomic radius in case of face centered cubic lattice is

 a / 4.
 a.
 a / 2.
 a / 3.

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Engineering Materials in EE
The intensity of magnetization, M, of a ferro magnetic solid

 is independent of temperature.
 depends on method of heating.
 decreases with increasing temperature.
 increases with increasing temperature.

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