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Engineering Materials in EE

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

 isentropic.
 visco elastic.
 inelastic.
 isotropic.

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Engineering Materials in EE
A degaussing is the process of

 demagnetising metallic parts.
 removal of magnetic impurities.
 remagnetising metallic parts.
 removing gases from materials.

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Engineering Materials in EE
Why diamond is very hard ?

 Because of covalent solid
None of these
 Because of large cohesive energy
 Because of high melting point

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Engineering Materials in EE
Susceptibility is negative for

 non magnetic substances.
 ferromagnetic substances.
 none of above.
 diamagnetic substances.

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Engineering Materials in EE
In ferromagnetic materials

 the constituent is only iron.
 one of the constituent is iron.
 the atomic magnetic moments are antiparallel and unequal.
 the atomic magnetic moments are parallel.

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Engineering Materials in EE
Permanent magnets are used in

 all of above.
 motors.
 loud speakers.
 generators.

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