High resistivity materials are used in
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Electrical Engineering Materials
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Low resistivity materials are used in
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Most of the common metals have _________ structure.
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Which of the following materials does not have covalent bonds ?
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For germanium the forbidden energy gap is
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Thermonic emission occurs in
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Copper, even though costly, finds use in the windings of electrical machines because
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_______ has zero temperature co-efficient of resistance.
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Which of the following is a semiconductor material ?
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Constantan contains
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__________ is the main constituent of glass.
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In a superconductor the value of critical density depends upon
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The co-ordination number of a simple cubic structure is
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The conduction of electricity, in semiconductors, takes place due to movement of
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In conductors conduction of electricity takes place due to movement of
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A highly conductive material must have
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Is an element used in semiconductors whose atoms have three valence electrons.
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The coils of D.C. motor starter are wound with wire of
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Due to which of the following factors the brush wear rate is altered?
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Which of the following affect greatly the resistivity of electrical conductors?
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