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CMC Medical CMC-Medical VELLORE Solved Paper-2007

  • question_answer
    An n-type semiconductor is formed by adding impurity materials

    A)  aluminium, boron or selenium

    B)  aluminium, boron or indium

    C)  phosphorus, antimony or arsenic

    D)  cobalt, aluminium or selenium

    Correct Answer: C

    Solution :

                    An n-type semiconductor material is formed by adding impurity materials which are pentavalent like phosphorus, antimony or arsenic.


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