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 ΩIR1​+−V1​15 VR2​8 ΩAR3​5 Ω

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

V1 = 15 VR1 = 10 ΩR2 = 8 ΩR3 = 5 Ω
IR1 = A
2.Easy
R1​ = 5 Ω+−V1​8 VR2​12 ΩAR3​5 Ω

Find the equivalent resistance Req seen by the source V1.

V1 = 8 VR1 = 5 ΩR2 = 12 ΩR3 = 5 Ω
Req = Ω
3.Medium
R1​ = 6 ΩR3​ = 3 Ω+−V1​30 VR2​2 ΩIR2​AR4​10 ΩB

Find the current IR2 through R2.

V1 = 30 VR1 = 6 ΩR2 = 2 ΩR3 = 3 ΩR4 = 10 Ω
IR2 = A
4.Medium
R1​ = 4 ΩIR1​R3​ = 2 Ω+−V1​15 VR2​10 ΩAR4​3 ΩB

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

V1 = 15 VR1 = 4 ΩR2 = 10 ΩR3 = 2 ΩR4 = 3 Ω
IR1 = A
5.Hard
R1​ = 25 ΩR3​ = 30 ΩR5​ = 12 Ω+−V1​9 VR2​10 ΩIR2​AR4​20 ΩBR6​15 Ω

Find the current IR2 through R2.

V1 = 9 VR1 = 25 ΩR2 = 10 ΩR3 = 30 ΩR4 = 20 ΩR5 = 12 ΩR6 = 15 Ω
IR2 = A
6.Hard
R1​ = 30 ΩIR1​R3​ = 10 ΩR5​ = 5 Ω+−V1​30 VR2​5 ΩAR4​4 ΩBR6​4 Ω

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

V1 = 30 VR1 = 30 ΩR2 = 5 ΩR3 = 10 ΩR4 = 4 ΩR5 = 5 ΩR6 = 4 Ω
IR1 = A

Answer key

  1. 1. IR1 = 1.147 A
  2. 2. Req = 8.529 Ω
  3. 3. IR2 = 3.362 A
  4. 4. IR1 = 2.045 A
  5. 5. IR2 = 0.2194 A
  6. 6. IR1 = 0.893 A

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