Question

Find the gain for the given op-amp circuit.

• A. $\frac{1}{3}$
• B. $3$
• C. $\frac{2}{3}$
• D. $2$

Hint:

Non-inverting gain = $1 + \frac{R_f}{R_g}$.

Answer 1

The Correct Option is B

Concept: This is a non-inverting amplifier configuration: \[ A_v = 1 + \frac{R_f}{R_g} \]

Step 1: Identify resistances \[ R_f = 0.02\,k\Omega,\quad R_g = 0.01\,k\Omega \]

Step 2: Calculate gain \[ A_v = 1 + \frac{0.02}{0.01} = 1 + 2 = 3 \] \[ \therefore \text{Correct answer is (B)} \]