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Engineering Materials in EE

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

 Diamagnetic.
 Soft iron.
 Ferromagnetic.
 Paramagnetic.

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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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Engineering Materials in EE
How many classes of insulating materials are there?

 7.
 6.
 8.
 5.

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Engineering Materials in EE
The materials which exhibit the same elastic properties in all directions are called

 isentropic.
 isotropic.
 inelastic.
 visco elastic.

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Engineering Materials in EE
Cryogenics is a branch of science dealing with which of the following?

  Low temperature.
 High temperature.
 Friction and wear.
 Crystal growth.

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Engineering Materials in EE
The electron configuration of sulfur atom is

 1s2 , 2s2 2p6, 3s2 3p6.
 2, 8, 2.
 none of these.
 2, 8, 6.

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