Question
Question: A triode has a mutual conductance of \(2 \times 10^{- 3}mho\) and an amplification factor of 50. The...
A triode has a mutual conductance of 2×10−3mho and an amplification factor of 50. The anode is connected through a resistance of 25×103 ohms to a 250 volts supply. The voltage gain of this amplifier is
A
50
B
25
C
100
D
12.5
Answer
25
Explanation
Solution
Using AV=1+RLrpμand μ=rp×gm
⇒rp=gmμ=2×10−350=25×103Ω
∴Av=1+25×10325×10350=25.