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​ = 12 ΩIR1​+−V1​24 VR2​4 ΩAR3​6 Ω

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

V1 = 24 VR1 = 12 ΩR2 = 4 ΩR3 = 6 Ω
IR1 = A
2.Easy
R1​ = 12 Ω+−V1​15 VR2​4 ΩAR3​12 Ω

Find the equivalent resistance Req seen by the source V1.

V1 = 15 VR1 = 12 ΩR2 = 4 ΩR3 = 12 Ω
Req = Ω
3.Medium
R1​ = 10 ΩR3​ = 15 Ω+−V1​6 VR2​3 ΩIR2​AR4​8 ΩB

Find the current IR2 through R2.

V1 = 6 VR1 = 10 ΩR2 = 3 ΩR3 = 15 ΩR4 = 8 Ω
IR2 = A
4.Medium
R1​ = 20 ΩIR1​R3​ = 2 Ω+−V1​6 VR2​12 ΩAR4​5 ΩB

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

V1 = 6 VR1 = 20 ΩR2 = 12 ΩR3 = 2 ΩR4 = 5 Ω
IR1 = A
5.Hard
R1​ = 30 ΩR3​ = 8 ΩR5​ = 2 Ω+−V1​30 VR2​12 ΩIR2​AR4​2 ΩBR6​5 Ω

Find the current IR2 through R2.

V1 = 30 VR1 = 30 ΩR2 = 12 ΩR3 = 8 ΩR4 = 2 ΩR5 = 2 ΩR6 = 5 Ω
IR2 = A
6.Hard
R1​ = 12 ΩR3​ = 30 ΩR5​ = 4 Ω+−V1​5 VR2​12 ΩIR2​AR4​12 ΩBR6​10 Ω

Find the current IR2 through R2.

V1 = 5 VR1 = 12 ΩR2 = 12 ΩR3 = 30 ΩR4 = 12 ΩR5 = 4 ΩR6 = 10 Ω
IR2 = A

Answer key

  1. 1. IR1 = 1.667 A
  2. 2. Req = 15 Ω
  3. 3. IR2 = 0.4195 A
  4. 4. IR1 = 0.2457 A
  5. 5. IR2 = 0.3765 A
  6. 6. IR2 = 0.1789 A

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