In a diode valve,the state of saturation can be obtained easily by

  • A
    High plate voltage and high filament current
  • B
    Low filament current and high plate voltage
  • C
    Low plate voltage and high cathode temperature
  • D
    High filament current and high plate voltage

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$A$ change of $0.8 \,mA$ in the anode current of a triode occurs when the anode potential is changed by $10 \,V$. If $\mu = 8$ for the triode,then what change in the grid voltage would be required to produce a change of $4 \,mA$ in the anode current?

In a triode amplifier,the value of maximum gain is equal to

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