Electronic Devices Question 197
Question: The amplification factor of a triode valve is 15. If the grid voltage is changed by 0.3 volt the change in plate voltage in order to keep the plate current constant (in volt) is
[CPMT 1990]
Options:
A) 0.02
B) 0.002
C) 4.5
D) 5.0
Show Answer
Answer:
Correct Answer: C
Solution:
$ \mu =\frac{\Delta V _{p}}{\Delta V _{g}} $
$ \Rightarrow \Delta V _{p}=\mu \Delta V _{g} $ =15 x 0.3 = 4.5 volt.
