1) The amplification factor of a triode is 50. If the grid potential is decreased by 0.20 V. What increase in plate potential will keep the plate current unchanged? A) 5V B) 10V C) 0.2V D) 50V Answer: Option BExplanation:Amplification factor of a triode , $\mu=\frac{\triangle V_{p}}{\triangle V_{g}}$ $\Rightarrow$ $\triangle V_{p}=-\mu\times \triangle V_{s}=-50(-20)=10V$
