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Engineering Materials in EE

Engineering Materials in EE
In Bohr’s model of atomic structure, the nucleus consists of

 protons and neutrons.
 protons.
 electrons.
 electrons and protons.

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Engineering Materials in EE
Which of the following gives materials in order of decreasing values of permeability?

 Silver, copper, aluminium, iron.
  Permalloy, nickel, air, water.
 Cobalt, nickel, aluminium, iron.
 Pure iron, silicon iron, aluminium, bismuth.

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Engineering Materials in EE
Find the odd one out.

 Absorptivity.
 Emissivity.
 Dielectric strength.
 Refractive index.

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Engineering Materials in EE
In electrical machines the material preferred for pole shoes of electromagnets is

 aluminium.
 copper.
 pure iron.
 lead.

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Engineering Materials in EE
Indicate which of following material does not retain magnetism permanently

 none of above.
 hardness steel.
 soft iron.
 stainless steel.

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Engineering Materials in EE
Temporary magnets are used in which of the following ?

  Hoist.
  Generators.
  Motors.
  All of these.

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MORE MCQ ON Engineering Materials in EE

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