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Engineering Materials in EE

Engineering Materials in EE
Find the odd one out.

 Absorptivity.
 Emissivity.
 Refractive index.
 Dielectric strength.

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

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

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

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

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

 Paramagnetic.
 Diamagnetic.
 Ferromagnetic.
 Soft iron.

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Engineering Materials in EE
When the atomic magnetic moments are randomly oriented in a solid its magnetic behavior is termed as

 paramagnetic.
 anti-ferromagnetic.
 semi-magnetic.
 poly crystalline.

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Engineering Materials in EE
A ferromagnetic core subjected to cycles of magnetisation will exhibit hysteresis when the cycle is

 pulsating.
 alternating.
 / >(A), (B), and (C) are all correct.
 rotating.

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MORE MCQ ON Engineering Materials in EE

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