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

  • question_answer
    Plate voltage of a triode is increased from 200 V to 225 V. To maintain the plate current, change in grid voltage from 5V to 5.75 V is needed. The amplification factor is  [RPET 2002]

    A)            40  

    B)            45

    C)            33.3                                          

    D)            25

    Correct Answer: C

    Solution :

               \[\mu ={{\left( \frac{\Delta {{V}_{p}}}{\Delta {{V}_{g}}} \right)}_{{{i}_{p}}=\text{constant}}}=\frac{(225-200)}{(5.75-5)}=33.3\]


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