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Engineering Materials in EE

Engineering Materials in EE
When will be the electron pair bonding occurs ?

 Share holes
 Lack holes
None of these
 Share electrons

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Engineering Materials in EE
The temperature beyond which substances lose their ferroelectric properties, is known as

 curie temperature.
 critical temperature.
 conversion temperature.
 inversion temperature.

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Engineering Materials in EE
Materials having a high dielectric constant, which is non-linear, are known as

 hard die-electrics.
 elastomers.
 super die-electrics.
 ferroelectric materials.

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

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

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Engineering Materials in EE
How many valence electrons would be found in an atom with the atomic number of 51?

 51.
 none of above.
 8.
 5.

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Engineering Materials in EE
The permeability of iron can be increased by

 increasing carbon percentage.
 purifying it.
 reducing carbon percentage.
 alloying with cobalt.

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