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

  • question_answer
    Due to S.C.R in vacuum tube                                      [RPET 2000]

    A)            \[{{I}_{p}}\to \]Decrease

    B)            \[{{I}_{p}}-\]Increase

    C)            \[{{V}_{p}}=\]Increase    

    D)            \[{{V}_{g}}=\]Increase

    Correct Answer: A

    Solution :

               In SCR (Space charge region) electrons collect around the plate, this cloud decreases the emission of electrons from the cathode, hence plate current decreases.


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