A certain noninverting amplifier has Ri of 1 kΩ and Rf of 100 kΩ. The closed-loop voltage gain is

Answer: Option C

To find the closed-loop voltage gain of a noninverting amplifier, use the formula:

Closed-loop voltage gain $$A_v$$ = $$1+\frac{R_f}{R_i}$$

Given:
- $$R_i$$ (input resistance) = 1 kΩ
- $$R_f$$ (feedback resistance) = 100 kΩ

Substitute these values into the formula:

$$A_v=1+\frac{100000}{1000}$$
$$A_v=1+100$$
$$A_v=101$$

Therefore, the closed-loop voltage gain is 101.