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

  • question_answer
    The grid voltage of any triode valve is changed from \[-1\] volt to \[-3\] volt and the mutual conductance is \[3\times {{10}^{-4}}\] mho. The change in plate circuit current will be

    A)  \[0.8\,mA\]

    B)  \[0.6\,mA\]

    C)  \[0.4\,mA\]

    D)  \[1\,mA\]

    Correct Answer: B

    Solution :

    [b] \[{{g}_{m}}=\frac{\Delta {{I}_{p}}}{\Delta {{V}_{g}}}\] or  \[\Delta {{I}_{p}}={{g}_{m}}\times \Delta {{V}_{g}}=3\times {{10}^{-4}}\times [-3-(-1)]\] \[=-0.6\times {{10}^{-3}}A=\]shortage of \[0.6\times {{10}^{-3}}A\]


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