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Engineering Materials in EE

Engineering Materials in EE
Magnetic recording tape is most commonly made from

 iron-dust.
 silicon-iron.
 small particles of iron.
 ferric-oxide.

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Engineering Materials in EE
Two different isotopes of an element have different

 numbers of electrons.
 atomic number.
 numbers of protons.
 numbers of neutrons.

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Engineering Materials in EE
Dielectric constant for vacuum is

  1.
 100.
  0.
  infinity.

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

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

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

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

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

 Ferromagnetic.
 Diamagnetic.
 Paramagnetic.
 Soft iron.

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MORE MCQ ON Engineering Materials in EE

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