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Engineering Materials in EE

Engineering Materials in EE
The core of a transformer for microwave frequency should be made of

  silicon carbide.
  ferrites.
  silicon.
 iron.

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

 Sulphur.
 Nitrogen.
 Carbon.
 Oxygen.

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Engineering Materials in EE
Choose the best suitable of Diamagnetic : Paramagnetic::

 Permalloy : Super-alloy.
 Water : Air.
 Iron : Steel.
 Nickel : Cobalt.

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

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

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Engineering Materials in EE
Maximum number of electrons in a sub-shell with l = 3 and n = 4 is

 10.
 8.
 14.
 20.

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

 Share holes
None of these
 Lack holes
 Share electrons

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