Electronic Devices Question 183

Due to SCR in vacuum tube

[RPET 2000]

Options:

A) $ I _{p}\to $ Decrease

B) $ I _{p}- $ Increase

C) $ V _{p}= $ Voltage Increase

D) $ V _{g}= $ Voltage Increase

Show Answer

Answer:

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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