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

  • question_answer
    The amplification factor of a triode valve is 15. If the grid voltage is changed by 0.3 volt the change in plate voltage in order to keep the plate current constant (in volt) is  [CPMT 1990]

    A)            0.02                                          

    B)            0.002

    C)            4.5 

    D)            5.0

    Correct Answer: C

    Solution :

               \[\mu =\frac{\Delta {{V}_{p}}}{\Delta {{V}_{g}}}\]\[\Rightarrow \Delta {{V}_{p}}=\mu \Delta {{V}_{g}}\] =15 ´ 0.3 = 4.5 volt.


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