EAMCET Medical EAMCET Medical Solved Paper-1999

  • question_answer
    The donor impurity to be added for doping germanium crystal will be of valency:

    A)  2                                            

    B)  3

    C)  4                                            

    D)  5

    Correct Answer: D

    Solution :

                     A pentavalent impurity like (phosphorous antimony, arsenic) is doped in pure, germanium crystal, its valency is 5.


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