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​ = 6 ΩIR1​+−V1​8 VR2​2 ΩAR3​5 Ω

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

V1 = 8 VR1 = 6 ΩR2 = 2 ΩR3 = 5 Ω
IR1 = A
2.Easy
R1​ = 12 Ω+−V1​18 VR2​6 ΩIR2​AR3​8 Ω

Find the current IR2 through R2.

V1 = 18 VR1 = 12 ΩR2 = 6 ΩR3 = 8 Ω
IR2 = A
3.Medium
R1​ = 4 ΩR3​ = 2 Ω+−V1​15 VR2​15 ΩAR4​15 ΩB

Find the equivalent resistance Req seen by the source V1.

V1 = 15 VR1 = 4 ΩR2 = 15 ΩR3 = 2 ΩR4 = 15 Ω
Req = Ω
4.Medium
R1​ = 12 ΩIR1​R3​ = 2 Ω+−V1​18 VR2​8 ΩAR4​8 ΩB

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

V1 = 18 VR1 = 12 ΩR2 = 8 ΩR3 = 2 ΩR4 = 8 Ω
IR1 = A
5.Hard
R1​ = 15 ΩR3​ = 3 ΩR5​ = 12 Ω+−V1​9 VR2​15 ΩIR2​AR4​30 ΩBR6​6 Ω

Find the current IR2 through R2.

V1 = 9 VR1 = 15 ΩR2 = 15 ΩR3 = 3 ΩR4 = 30 ΩR5 = 12 ΩR6 = 6 Ω
IR2 = A
6.Hard
R1​ = 20 ΩR3​ = 25 ΩR5​ = 6 Ω+−V1​5 VR2​8 ΩIR2​AR4​5 ΩBR6​10 Ω

Find the current IR2 through R2.

V1 = 5 VR1 = 20 ΩR2 = 8 ΩR3 = 25 ΩR4 = 5 ΩR5 = 6 ΩR6 = 10 Ω
IR2 = A

Answer key

  1. 1. IR1 = 1.077 A
  2. 2. IR2 = 0.6667 A
  3. 3. Req = 11.97 Ω
  4. 4. IR1 = 1.095 A
  5. 5. IR2 = 0.1966 A
  6. 6. IR2 = 0.149 A

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