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MGIMS WARDHA MGIMS WARDHA Solved Paper-2009

  • question_answer
    The electrical conductivity of semiconductor increases, when electromagnetic radiation of wavelength shorter than \[24800{AA}\] nm a incident on it. The band gap for the semiconductor is                    

    A)  0.9 eV                                 

    B)  0.7 eV     

    C)  0.5 eV                                 

    D)   1.1 eV        

    Correct Answer: C

    Solution :

    \[\Delta E=\frac{hc}{\lambda }=\frac{12375}{\lambda }eV\] \[\Delta E=\frac{12375}{24800}=0.5eV\]


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