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Engineering Materials in EE

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

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

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Engineering Materials in EE
Which of the following statements is not part of Daltons atomic theory?

 Atoms of different elements are quite different.
 All matter is composed of atoms.
 An atom contains a dense central nucleus.
 Atoms can combine to form compounds.

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Engineering Materials in EE
The magnetisation and applied field in ferromagnetic materials are related

 linearly.
 sinusoidally.
 parabolically.
 non linearly.

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Engineering Materials in EE
In ferromagnetic materials

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

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Engineering Materials in EE
The dielectric strength of ferroelectric materials depends to a large extent on

 presence of magnetic materials in the vicinity.
 frequency of applied voltage.
 area of hysteresis loop for the material.
 intensity of electric field.

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Engineering Materials in EE
The atomic radius in case of face centered cubic lattice is

 a / 2.
 a / 3.
 a / 4.
 a.

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