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Engineering Materials in EE

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

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

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

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

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

 isentropic.
 inelastic.
 isotropic.
 visco elastic.

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Engineering Materials in EE
Which of the following is the least desired property in magnetic materials for electrical engineering applications ?

All of these
 High electrical resistivity.
 Large hysteresis loop.
 High magnetic permeability.

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Engineering Materials in EE
________ is the most detrimental impurity in the magnetic materials

 Oxygen.
 Carbon.
 Nitrogen.
 Sulphur.

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

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

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