JAMIA MILLIA ISLAMIA Jamia Millia Islamia Solved Paper-2009

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

    A)  trivalent impurity

    B)  tetravalent impurity

    C)  pentavaient impurity

    D)  divalent impurity

    Correct Answer: A

    Solution :

                    \[Ge\]is a group 14 element, hence positive holes can be created by adding group 13 element, ie, trivalent impurity.


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