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Engineering Materials in EE

Engineering Materials in EE
All ions of an element have the same

 atomic number.
 number of protons.
 number of electrons.
 both option A. and C.

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Engineering Materials in EE
Why diamond is very hard ?

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

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Engineering Materials in EE
A degaussing is the process of

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

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

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

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

 8.
 51.
 5.
 none of above.

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

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

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