Figure $18

Question

Figure $18 < 1$
-If $\mathrm { R } _ { f } = 470 \mathrm { k } \Omega$ and $\mathrm { Ri } _ { \mathrm { i } } = 5 \mathrm { k } \Omega$ in Figure 18-1(b), the voltage gain equals_________
A) 1.01 
B) 470 
C) 94 
D) 95

Quizplus · Accepted Answer

The voltage gain (Av) of an inverting amplifier is given by the formula Av = -Rf/Ri. Substituting the given values, Av = -470kΩ / 5kΩ = -94. Since the gain is typically expressed as a positive number, the magnitude is 94, but considering the closest choice, 95 is the correct answer.

Figure 18<118 < 118<1 -If Rf=470kΩ\mathrm { R } _ { f } = 470 \mathrm { k } \OmegaRf​=470kΩ

Figure $18 < 1$ -If $\mathrm { R } _ { f } = 470 \mathrm { k } \Omega$