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

  • question_answer
    The amplification factor of a triode is 50. If the grid potential is decreased by 0.20 V, what increase in plate potential will keep the plate current unchanged                        [RPMT 1999]

    A)            5 V                                            

    B)            10 V

    C)            0.2 V                                        

    D)            50 V

    Correct Answer: B

    Solution :

                       \[\mu =-\frac{\Delta {{V}_{p}}}{\Delta {{V}_{g}}}\]                    \[\Rightarrow \Delta {{V}_{p}}=-\mu \times \Delta {{V}_{g}}\]=?50(?0.20) = 10V.


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