Figure $18

Question

Figure $18 < 1$
-If $\mathrm { R } _ { f } = 150 \mathrm { k } \Omega$  and $\mathrm { R } _ { \mathrm { i } } = 2.2 \mathrm { k } \Omega$ in Figure 18-1(c), the voltage gain equals________
A) -1 
B) -68.2 
C) -69.2 
D) infinite

Quizplus · Accepted Answer

The voltage gain in an inverting amplifier configuration is given by the formula $A_v = -\frac{R_f}{R_i}$, where $R_f$ is the feedback resistor and $R_i$ is the input resistor. Plugging in the given values, $A_v = -\frac{150k\Omega}{2.2k\Omega} = -68.18$, which rounds to -68.2, making option B the correct choice.

Figure 18<118 < 118<1 -If Rf=150kΩ\mathrm { R } _ { f } = 150 \mathrm { k } \OmegaRf​=150kΩ

Figure $18 < 1$ -If $\mathrm { R } _ { f } = 150 \mathrm { k } \Omega$