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​6 VR2​4 ΩIR2​AR3​5 Ω

Find the current IR2 through R2.

V1 = 6 VR1 = 10 ΩR2 = 4 ΩR3 = 5 Ω
IR2 = A
2.Easy
R1​ = 3 ΩIR1​+−V1​24 VR2​10 ΩAR3​5 Ω

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

V1 = 24 VR1 = 3 ΩR2 = 10 ΩR3 = 5 Ω
IR1 = A
3.Medium
R1​ = 3 ΩR3​ = 20 Ω+−V1​9 VR2​2 ΩAR4​20 ΩB

Find the equivalent resistance Req seen by the source V1.

V1 = 9 VR1 = 3 ΩR2 = 2 ΩR3 = 20 ΩR4 = 20 Ω
Req = Ω
4.Medium
R1​ = 10 ΩIR1​R3​ = 2 Ω+−V1​9 VR2​3 ΩAR4​8 ΩB

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

V1 = 9 VR1 = 10 ΩR2 = 3 ΩR3 = 2 ΩR4 = 8 Ω
IR1 = A
5.Hard
R1​ = 10 ΩR3​ = 30 ΩR5​ = 4 Ω+−V1​30 VR2​10 ΩIR2​AR4​12 ΩBR6​2 Ω

Find the current IR2 through R2.

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

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

V1 = 6 VR1 = 15 ΩR2 = 30 ΩR3 = 4 ΩR4 = 4 ΩR5 = 20 ΩR6 = 5 Ω
IR1 = A

Answer key

  1. 1. IR2 = 0.2727 A
  2. 2. IR1 = 3.789 A
  3. 3. Req = 4.905 Ω
  4. 4. IR1 = 0.7313 A
  5. 5. IR2 = 1.308 A
  6. 6. IR1 = 0.2862 A

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