JEE Main & Advanced Physics Semiconducting Devices Question Bank Valve Electronics (Diode and Triode)

  • question_answer
    The amplification factor of a triode is 20. Its plate resistance is 10 kilo ohms. Mutual conductance is [MNR 1992; Orissa JEE 2005]

    A)            \[2\times {{10}^{5}}\]mho     

    B)            \[2\times {{10}^{4}}\]mho

    C)            500 mho                                 

    D)            \[2\times {{10}^{-3}}\]mho

    Correct Answer: D

    Solution :

               Using \[\mu ={{r}_{p}}\times {{g}_{m}}\]\[\Rightarrow {{g}_{m}}=\frac{20}{10\times {{10}^{3}}}=2\times {{10}^{-3}}\].


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