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JEE Main & Advanced Physics Semiconducting Devices Question Bank Semiconductors

  • question_answer
    A piece of copper and the other of germanium are cooled from the room temperature to 80 K, then which of the following would be a correct statement  [IIT-JEE 1988; Bihar CEE 1992; CBSE PMT 1993; MP PET 1997; RPET 1999; AIEEE 2004]

    A)            Resistance of each increases

    B)            Resistance of each decreases

    C)            Resistance of copper increases while that of germanium decreases

    D)            Resistance of copper decreases while that of germanium increases

    Correct Answer: D

    Solution :

               Resistance of conductors (Cu) decreases with decrease in temperature while that of semi-conductors (Ge) increases with decrease in temperature.


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