Punjab Medical Punjab - MET Solved Paper-2004

  • question_answer
    In a junction diode the holes due to:

    A)  missing electron             

    B)  extra neutron

    C)  protons              

    D)  all of these

    Correct Answer: A

    Solution :

    As in a semiconductor material when an electron leaves its plate, a positive charge is left behind it and hole is created, thus, holes are formed because of missing electron.


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