Figure $18

Question

Figure $18 < 1$
-If $\mathrm { R } _ { f } = 0.5 \mathrm { M } \Omega$ and $\mathrm { R } _ { \mathrm { i } } = 10 \mathrm { k } \Omega$ in Figure 18-1(b), the voltage gain equals________
A) 6 
B) 5 
C) 50 
D) 51

Quizplus · Accepted Answer

The voltage gain $A_v$ in an operational amplifier circuit with feedback can be calculated using the formula $A_v = 1 + \frac{R_f}{R_i}$, where $R_f$ is the feedback resistance and $R_i$ is the input resistance. Given $R_f = 0.5 M\Omega = 500 k\Omega$ and $R_i = 10 k\Omega$, substituting these values into the formula gives $A_v = 1 + \frac{500 k\Omega}{10 k\Omega} = 1 + 50 = 51$.

Figure 18<118 < 118<1 -If Rf=0.5MΩ\mathrm { R } _ { f } = 0.5 \mathrm { M } \OmegaRf​=0.5MΩ

Figure $18 < 1$ -If $\mathrm { R } _ { f } = 0.5 \mathrm { M } \Omega$