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

  • question_answer
    In the circuit of a triode valve, there is no change in the plate current, when the plate potential is increased from 200 volt to 220 volt and the grid potential is decreased from ? 0.5 volt to ?1.3 volt. The amplification factor of this valve is  [MP PMT 1989]

    A)            15  

    B)            20

    C)            25  

    D)            35

    Correct Answer: C

    Solution :

               \[\mu =\frac{({{V}_{{{p}_{1}}}}-{{V}_{{{p}_{2}}}}}{({{V}_{{{G}_{1}}}}-{{V}_{{{G}_{2}}}})}\]\[=\frac{(200-220)}{(0.5-1.3)}=25.\]


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