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NEET Physics Semiconducting Devices NEET PYQ-Semiconducting Devices

  • question_answer
    Which of the following when added as an impurity into silicon produces n-type semiconductor?             [AIPMT 1999]

    A)  P        

    B)                   Al

    C)  B        

    D)                   Mg

    Correct Answer: A

    Solution :

    When pentavalent impurity is added to silicon then n-type semiconductor is formed. Out of given options only phosphorus (P) is pentavalent, so it should be doped to silicon to make it n-type semiconductor.


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