RAJASTHAN ­ PET Rajasthan PET Solved Paper-2003

  • question_answer
    What is valancy of impurity added for donar atoms?

    A)  Pentavalent       

    B)  Trivalent        

    C)  Tertravalent      

    D)  None of these     

    Correct Answer: A

    Solution :

     N-type crystal obtained by adding a small amount of pentavalent impurity.


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