Semiconducting Devices Question 270
Question: In a triode amplifier, $ \mu =25,r _{p}=40 $ kilo ohm and load resistance $ R _{L}=10 $ kilo ohm. If the input signal voltage is 0.5 volt, then output signal voltage will be
[RPMT 1995]
Options:
A) 1.25 volt
B) 5 volt
C) 2.5 volt
D) 10 volt
Show Answer
Answer:
Correct Answer: C
Solution:
Voltage gain $ =\frac{{V _{\text{out}}}}{{V _{\text{in}}}}=\frac{\mu }{1+\frac{r _{p}}{R _{L}}} $
$ \Rightarrow \frac{{V _{\text{out}}}}{0.5}=\frac{25}{1+\frac{40\times 10^{3}}{10\times 10^{3}}} $
$ \Rightarrow {V _{\text{out}}}=2.5V $ .
