Electronic Devices Question 191

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 $ .



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