Question

a voltage - follower
select one:
○ a. is noninverting
○ b. has a gain of 1
○ c. all of the answers are correct
○ d. has no feedback resistor

Explanation:

A voltage-follower is a noninverting op-amp configuration where the output is connected directly to the inverting input (no dedicated feedback resistor). Its voltage gain formula is $A_v = 1 + \frac{R_f}{R_{in}}$, and since $R_f = 0$, $A_v = 1$. It preserves the input signal's polarity, so it is noninverting. All options a, b, and d are accurate, making option c correct.

Answer:

c. all of the answers are correct