BHU PMT BHU PMT (Mains) Solved Paper-2010

  • question_answer
    A semiconductor of Ge can be made p-type by adding

    A)  trivalent impurity

    B)  tetravalent impurity

    C)  pentavalent impurity

    D)  divalent impurity

    Correct Answer: A

    Solution :

                     When a semiconductor is doped with a trivalent impurity (like B, Al), p-type semiconductor is obtained. n-type semiconductor is obtained by adding pentavalent impurity.


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