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JEE Main & Advanced Physics Semiconducting Devices Question Bank Self Evaluation Test - Semiconductor Electronics: Materials, Devices and Simple Circuits

  • question_answer
    On doping germanium with donor atoms of density \[{{10}^{17}}\,c{{m}^{-3}}\] its conductivity in mho/cm will be [Given \[{{\mu }_{e}}=3800\,c{{m}^{2}}V-s\] and \[{{n}_{i}}=2.5\times {{10}^{13}}c{{m}^{-13}}\]]

    A)          \[30.4\] 

    B)  \[60.8\]  

    C)  \[91.2\] 

    D)  \[121.6\]

    Correct Answer: B

    Solution :

    [b] Conductivity \[\sigma ={{n}_{i}}e{{\mu }_{e}}={{10}^{17}}\times (1.6\times {{10}^{-19}})\times 3800\] \[=60.8\,mho/cm\]


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