Q. 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
A) 1.25 $volt$
B) 5 $volt$
C) $2.5\ volt$
D) 10 $volt$
Explanation
(c) Voltage gain $= \frac{V_{out}}{V_{in}} = \frac{\mu}{1 + \frac{r_{p}}{R_{L}}} \Rightarrow \frac{V_{out}}{0.05} = \frac{25}{1 + \frac{40 \times 10^{3}}{10 \times 10^{3}}}$
$\Rightarrow V_{out} = 2.5\ V$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.