Series & parallel resistors worksheet with answers

Free printable Series & parallel resistors 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
R1​ = 10 Ω+−V1​20 VR2​3 ΩAR3​8 Ω

Find the equivalent resistance Req seen by the source V1.

V1 = 20 VR1 = 10 ΩR2 = 3 ΩR3 = 8 Ω
Req = Ω
2.Easy
R1​ = 6 ΩIR1​+−V1​8 VR2​8 ΩAR3​10 Ω

Find the current IR1 delivered by the source, which flows through R1.

V1 = 8 VR1 = 6 ΩR2 = 8 ΩR3 = 10 Ω
IR1 = A
3.Medium
R1​ = 8 ΩR3​ = 12 Ω+−V1​15 VR2​3 ΩIR2​AR4​5 ΩB

Find the current IR2 through R2.

V1 = 15 VR1 = 8 ΩR2 = 3 ΩR3 = 12 ΩR4 = 5 Ω
IR2 = A
4.Medium
R1​ = 2 ΩIR1​R3​ = 15 Ω+−V1​10 VR2​15 ΩAR4​15 ΩB

Find the current IR1 delivered by the source, which flows through R1.

V1 = 10 VR1 = 2 ΩR2 = 15 ΩR3 = 15 ΩR4 = 15 Ω
IR1 = A
5.Hard
R1​ = 20 ΩR3​ = 4 ΩR5​ = 5 Ω+−V1​15 VR2​2 ΩIR2​AR4​15 ΩBR6​12 Ω

Find the current IR2 through R2.

V1 = 15 VR1 = 20 ΩR2 = 2 ΩR3 = 4 ΩR4 = 15 ΩR5 = 5 ΩR6 = 12 Ω
IR2 = A
6.Hard
R1​ = 15 ΩIR1​R3​ = 15 ΩR5​ = 10 Ω+−V1​30 VR2​3 ΩAR4​5 ΩBR6​3 Ω

Find the current IR1 delivered by the source, which flows through R1.

V1 = 30 VR1 = 15 ΩR2 = 3 ΩR3 = 15 ΩR4 = 5 ΩR5 = 10 ΩR6 = 3 Ω
IR1 = A

Answer key

  1. 1. Req = 12.18 Ω
  2. 2. IR1 = 0.766 A
  3. 3. IR2 = 1.209 A
  4. 4. IR1 = 0.8333 A
  5. 5. IR2 = 0.5919 A
  6. 6. IR1 = 1.706 A

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