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JEE Main & Advanced Physics Semiconducting Devices Question Bank Semiconductors

  • question_answer
    Electronic configuration of germanium is 2, 8, 18 and 4. To make it extrinsic semiconductor small quantity of antimony is added                                                                                     [MP PET 1999]

    A)            The material obtained will be N-type germanium in which electrons and holes are equal in number

    B)            The material obtained will be P-type germanium

    C)            The material obtained will be N-type germanium which has more electrons than holes at room temperature

    D)            The material obtained will be N-type germanium which has less electrons than holes at room temperature

    Correct Answer: C

    Solution :

               Antimony is a fifth group impurity and is therefore a donor of electrons.


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