CMC Medical CMC-Medical VELLORE Solved Paper-2008

  • question_answer
    The electrical conductivity of a semiconductor increases when an electromagnetic radiation of wavelength shorter than 1125 nm is incident on it. The band gap of the semiconductor is

    A)  0.9 eV                                 

    B)  0.7 eV

    C)  0.5 eV                                 

    D)  0.8 eV

    E)  1.1 eV

    Correct Answer: E

    Solution :

                    The band gap of semiconductor is midwa between that of a conductor and insulator and is equivalent to 1.1 eV.


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