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Engineering Materials in EE

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

 parabolically.
 sinusoidally.
 non linearly.
 linearly.

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Engineering Materials in EE
A degaussing is the process of

 demagnetising metallic parts.
 removal of magnetic impurities.
 removing gases from materials.
 remagnetising metallic parts.

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Engineering Materials in EE
________ is the most detrimental impurity in the magnetic materials

 Sulphur.
 Carbon.
 Nitrogen.
 Oxygen.

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Engineering Materials in EE
Positive magnetostriction exists when

 both are correct.
 dipoles are repel other.
 none of above.
 dipoles are attract each other.

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Engineering Materials in EE
ALNICO is an alloy of

 aluminium, nickel, iron and cobalt.
 aluminium, nickel.
 iron, aluminium.
 iron, cobalt, nickel.

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Engineering Materials in EE
How many classes of insulating materials are there?

 7.
 5.
 6.
 8.

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