The superconductivity is due to
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Electrical Engineering Materials
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Overhead telephone wires are made of
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_________ is most commonly used for making magnetic recording tape
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A good electric contact material should have all of the following properties except
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Non-linear resistors
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The covalent bond is formed by
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The formula __________ determines the number of electrons that can be accommodated in any level.
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Carbon electrodes are not used in
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At transition temperature the value of critical field is
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Solder is an alloy of
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A carbon resistor contains
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Which of the following material is not a semiconductor ?
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Which of the following materials is preferred for transmitting electrical energy over long distance ?
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The forbidden gap in an insulator is
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Platinum is used in
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In a crystal, an atom vibrates at a frequency determined by
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Due to which of the following reasons copper and aluminium are not used for heating elements ?
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Thermocouples are mainly used for the measurement of
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Which of the following high resistance materials has the highest operating temperature ?
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The transition temperature of mercury is
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