VMMC VMMC Medical Solved Paper-2012

  • question_answer
    Which one of the following statement is false?

    A) Pure Si doped with trivalent impurities gives a p-type semiconductor

    B)  Majority   carriers in a n-type semiconductor are holes

    C)  Minority    carriers in a p-type semiconductor are electrons              

    D)  The resistance of intrinsic semiconductor decreases with increase of temperature

    Correct Answer: A

    Solution :

     p-type semiconductor are obtained by adding a small amount of trivalent impurity to a pure sample of semiconductor (Ge). Majority charge carriers ? holes Minority charge carriers ___ electrons n-type semiconductor are obtained by adding a small amount of pentavalent impurity to a pure sample of semiconductor (Ge). Majority charge carriers?electrons The resistance of intrinsic semiconductors decreases with increase of temperature.


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