DUMET Medical DUMET Medical Solved Paper-2002

  • question_answer
    In junction diode, the holes are due to :

    A)  missing electron

    B)  proton

    C)  neutron

    D)  none of the above

    Correct Answer: A

    Solution :

    Key Idea: Hole moves in direction opposite to that of electron. Hole is equivalent to a positively charged particle. The p-type semiconductor crystal has freely moving (positive) holes and an equal number of stationary negatively charge acceptor ions. Thus, holes are due to missing electrons.


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