Q 12-14-110JEE MainJEE Main 2022 (25 Jun, Shift 2)Medium
In an experiment of CE configuration of an $n$-$p$-$n$ transistor, the transfer characteristics are observed as given in figure. If the input resistance is $200\ \Omega$ and output resistance is $60\ \Omega$, the voltage gain in this experiment will be ______.
Numerical value type. Enter your answer.
Answer: 15
From the graph, $\beta = \dfrac{\Delta I_C}{\Delta I_B} = \dfrac{5\ \text{mA}}{100\ \mu\text{A}} = 50$.
$$A_V = \beta\frac{R_{\text{out}}}{R_{\text{in}}} = 50\times\frac{60}{200} = 15$$
Solution by Sreeraj P, M.Sc Physics