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​ = 4 Ω+−V1​6 VR2​12 ΩIR2​AR3​12 Ω

Find the current IR2 through R2.

V1 = 6 VR1 = 4 ΩR2 = 12 ΩR3 = 12 Ω
IR2 = A
2.Easy
R1​ = 6 Ω+−V1​12 VR2​12 ΩAR3​5 Ω

Find the equivalent resistance Req seen by the source V1.

V1 = 12 VR1 = 6 ΩR2 = 12 ΩR3 = 5 Ω
Req = Ω
3.Medium
R1​ = 3 ΩIR1​R3​ = 12 Ω+−V1​10 VR2​10 ΩAR4​10 ΩB

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

V1 = 10 VR1 = 3 ΩR2 = 10 ΩR3 = 12 ΩR4 = 10 Ω
IR1 = A
4.Medium
R1​ = 10 ΩR3​ = 10 Ω+−V1​10 VR2​20 ΩIR2​AR4​5 ΩB

Find the current IR2 through R2.

V1 = 10 VR1 = 10 ΩR2 = 20 ΩR3 = 10 ΩR4 = 5 Ω
IR2 = A
5.Hard
R1​ = 4 ΩIR1​R3​ = 2 ΩR5​ = 8 Ω+−V1​6 VR2​25 ΩAR4​12 ΩBR6​5 Ω

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

V1 = 6 VR1 = 4 ΩR2 = 25 ΩR3 = 2 ΩR4 = 12 ΩR5 = 8 ΩR6 = 5 Ω
IR1 = A
6.Hard
R1​ = 3 ΩIR1​R3​ = 20 ΩR5​ = 4 Ω+−V1​6 VR2​4 ΩAR4​25 ΩBR6​2 Ω

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

V1 = 6 VR1 = 3 ΩR2 = 4 ΩR3 = 20 ΩR4 = 25 ΩR5 = 4 ΩR6 = 2 Ω
IR1 = A

Answer key

  1. 1. IR2 = 0.3 A
  2. 2. Req = 9.529 Ω
  3. 3. IR1 = 1.013 A
  4. 4. IR2 = 0.2308 A
  5. 5. IR1 = 0.5884 A
  6. 6. IR1 = 0.9309 A

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