Question

The DC voltage gain $\frac{V_0}{V_i}$ in the following circuit is given by

• A. $A_v\frac{R_2}{R_1+R_2}$
• B. $A_v\frac{R_1}{R_1+R_2}$
• C. $A_v\frac{R_2}{R_1+R_2}+R_0$
• D. $A_v$

Answer 1

The correct option is A $A_v\frac{R_2}{R_1+R_2}$

By voltage division rule voltage V across $R_2$



$V=\frac{R_2}{R_1+R_2}.V_i$

and output voltage

$V_0=A_{v}V$

$\therefore V_0=A_v.\frac{R_2}{R_1+R_2}.V_i$

$\therefore$ DC voltage gain,

$\frac{V_0}{V_i}=\frac{R_2}{R_1+R_2}{A}_v$