NEET AIPMT SOLVED PAPER SCREENING 2011

  • question_answer
    If a small amount of antimony is added to germanium crystal

    A)  the antimony becomes an acceptor atom

    B)  there will be more free electrons than holes in the semiconductor

    C)  its resistance is increased

    D)  it becomes a p-type semiconductor

    Correct Answer: B

    Solution :

    When a small amount of antimony is added to germanium crystal, the crystal becomes n-type semiconductor because antimony is a pentavalent substrate. It excess free electrons,


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