In common emitter transistor amplifier, load resistance is $6.5 \mathrm{k} \Omega$ and an input resistance…
In common emitter transistor amplifier, load resistance is $6.5 \mathrm{k} \Omega$ and an input resistance is $1.3 \mathrm{k} \Omega$. If the current gain is 78 , the voltage gain is
780
390
260
50
Solution
$\begin{aligned} & \text { Current gain } \beta=78 \\ & \begin{aligned} \text { Voltage gain } & =\beta \times \frac{\mathrm{R}_{\mathrm{L}}}{\mathrm{R}_{\mathrm{in}}}=78 \times \frac{6.5 \times 10^3}{1.3 \times 10^3} \\ & =390\end{aligned}\end{aligned}$