Question

Due to S.C.R in vacuum tube

• A. $I_{p} \rightarrow$Decrease
• B. $I_{p} -$Increase
• C. $V_{p} =$Increase
• D. $V_{g} =$Increase

Answer 1

Answer: (A)

$I_{p} \rightarrow$Decrease

Answer 2

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