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  1. Solids which conduct electricity at higher temperature but not at lower temperature are called

    2. A.

     Super-conductor
    B.

     Metallic-conductor
    C.

     Semi-conductor
    D.

     Insulator

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    Answer : Option C

    Explanation :

    Semiconductors are insulators at low temperatures and reasonably good conductors at higher temperatures. As temperature increases, the semiconductor material becomes a better and better conductor.

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