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Engineering Materials in EE

Engineering Materials in EE
Materials which lack permanent magnetic dipoles are called

 ferro-magnectic.
 dia-magnetic.
None of these
 semi-magnetic.

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Engineering Materials in EE
ALNICO is an alloy of

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

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Engineering Materials in EE
Dielectric constant for vacuum is

  0.
 100.
  1.
  infinity.

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Engineering Materials in EE
A material with unequal anti-parallel atomic magnetic moments is

 non-magnetic.
 a ferrite.
 an anti-ferromagnet.
 ferrimagnet.

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Engineering Materials in EE
According to the Bohr model, an electron gains or losses energy only by

 moving faster or slower in an allowed orbit.
 being completely removed from an atom.
 jumping from one allowed orbit to another.
 jumping from one atom to another atom.

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Engineering Materials in EE
It is difficult to magnetize steel because it has

 high permeability.
  low permeability.
 low susceptibility.
 high permittivity.

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MORE MCQ ON Engineering Materials in EE

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