Op-amp circuits worksheet with answers

Free printable Op-amp circuits worksheet: 6 problems from easy to exam level, with an answer key. Print it or save it as a PDF.

New worksheetPractise online with hints

For teachers: free to print, copy and use in class. Every new worksheet has new values and its own answer key. A link to ExamProblems on your course page is appreciated.

Name: ____________________   Date: ____________

1.Easy
−+Vout​Rf​ = 47 kΩVin​ = −1 VR1​ = 10 kΩ

The op-amp is ideal and runs from ±15 V supplies. Find the output voltage Vout.

Vin = −1 VR1 = 10 kΩRf = 47 kΩ
Vout = V
2.Easy
−+Vout​Rf​ = 10 kΩVin​ = −0.8 VR1​ = 1 kΩI1​

The op-amp is ideal and runs from ±15 V supplies. Find the current I1 through R₁, flowing towards the op-amp.

Vin = −0.8 VR1 = 1 kΩRf = 10 kΩ
I1 = mA
3.Medium
−+Vout​Rf​ = ?R1​ = 100 kΩVin​

Choose the feedback resistor Rf that gives this non-inverting amplifier a voltage gain of 21.

R1 = 100 kΩAv = 21
Rf = kΩ
4.Medium
−+Vout​Rf​ = ?R1​ = 100 kΩVin​

Choose the feedback resistor Rf that gives this non-inverting amplifier a voltage gain of 31.

R1 = 100 kΩAv = 31
Rf = kΩ
5.Hard
−+Vout​R2​ = 2 kΩV1​ = 1.9 VR1​ = 4.7 kΩV2​ = 0.7 VR3​ = 47 kΩR4​ = 2 kΩ

The op-amp is ideal and runs from ±15 V supplies. The resistor ratios are not matched. Find the output voltage Vout.

V1 = 1.9 VV2 = 0.7 VR1 = 4.7 kΩR2 = 2 kΩR3 = 47 kΩR4 = 2 kΩ
Vout = V
6.Hard
−+Vout​Rf​ = 22 kΩV1​ = 0.1 VR1​ = 10 kΩV2​ = 1.2 VR2​ = 47 kΩ

The summing amplifier uses an ideal op-amp with ±15 V supplies. Find the output voltage Vout.

V1 = 0.1 VV2 = 1.2 VR1 = 10 kΩR2 = 47 kΩRf = 22 kΩ
Vout = V

Answer key

  1. 1. Vout = 4.7 V
  2. 2. I1 = −0.8 mA
  3. 3. Rf = 2000 kΩ
  4. 4. Rf = 3000 kΩ
  5. 5. Vout = −0.7678 V
  6. 6. Vout = −0.7817 V

Full step-by-step solutions: practise this topic on examproblems.com.