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.

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1.Easy
R1​ = 6 Ω+−V1​6 VR2​4 ΩAR3​10 Ω

Find the equivalent resistance Req seen by the source V1.

V1 = 6 VR1 = 6 ΩR2 = 4 ΩR3 = 10 Ω
Req = Ω
2.Easy
R1​ = 6 Ω+−V1​6 VR2​10 ΩIR2​AR3​6 Ω

Find the current IR2 through R2.

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

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

V1 = 15 VR1 = 10 ΩR2 = 2 ΩR3 = 3 ΩR4 = 2 Ω
IR1 = A
4.Medium
R1​ = 4 ΩIR1​R3​ = 10 Ω+−V1​18 VR2​6 ΩAR4​4 ΩB

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

V1 = 18 VR1 = 4 ΩR2 = 6 ΩR3 = 10 ΩR4 = 4 Ω
IR1 = A
5.Hard
R1​ = 2 ΩIR1​R3​ = 30 ΩR5​ = 15 Ω+−V1​36 VR2​6 ΩAR4​10 ΩBR6​2 Ω

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

V1 = 36 VR1 = 2 ΩR2 = 6 ΩR3 = 30 ΩR4 = 10 ΩR5 = 15 ΩR6 = 2 Ω
IR1 = A
6.Hard
R1​ = 10 ΩIR1​R3​ = 10 ΩR5​ = 25 Ω+−V1​36 VR2​20 ΩAR4​8 ΩBR6​4 Ω

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

V1 = 36 VR1 = 10 ΩR2 = 20 ΩR3 = 10 ΩR4 = 8 ΩR5 = 25 ΩR6 = 4 Ω
IR1 = A

Answer key

  1. 1. Req = 8.857 Ω
  2. 2. IR2 = 0.2308 A
  3. 3. IR1 = 1.313 A
  4. 4. IR1 = 2.195 A
  5. 5. IR1 = 5.036 A
  6. 6. IR1 = 1.898 A

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