CET Karnataka Medical CET - Karnataka Medical Solved Paper-2012

  • question_answer
    Copper and Germanium are cooled from room temperature to 100 K. Then the resistance of

    A)  Germanium decreases. Copper increases

    B)  Germanium decreases. Copper decreases

    C)  Germanium increases. Copper decreases

    D)  Germanium increases. Copper increases    

    Correct Answer: C

    Solution :

    : The temperature coefficient of resistance of copper is positive and of germanium is negative. Hence the resistance of germanium increases and copper decreases with fall in temperature.


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