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​ = 2 ΩIR1​+−V1​24 VR2​3 ΩAR3​2 Ω

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

V1 = 24 VR1 = 2 ΩR2 = 3 ΩR3 = 2 Ω
IR1 = A
2.Easy
R1​ = 4 Ω+−V1​10 VR2​2 ΩAR3​6 Ω

Find the equivalent resistance Req seen by the source V1.

V1 = 10 VR1 = 4 ΩR2 = 2 ΩR3 = 6 Ω
Req = Ω
3.Medium
R1​ = 6 ΩR3​ = 2 Ω+−V1​6 VR2​20 ΩIR2​AR4​6 ΩB

Find the current IR2 through R2.

V1 = 6 VR1 = 6 ΩR2 = 20 ΩR3 = 2 ΩR4 = 6 Ω
IR2 = A
4.Medium
R1​ = 12 ΩIR1​R3​ = 4 Ω+−V1​24 VR2​4 ΩAR4​20 ΩB

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

V1 = 24 VR1 = 12 ΩR2 = 4 ΩR3 = 4 ΩR4 = 20 Ω
IR1 = A
5.Hard
R1​ = 15 ΩR3​ = 25 ΩR5​ = 20 Ω+−V1​10 VR2​2 ΩIR2​AR4​30 ΩBR6​30 Ω

Find the current IR2 through R2.

V1 = 10 VR1 = 15 ΩR2 = 2 ΩR3 = 25 ΩR4 = 30 ΩR5 = 20 ΩR6 = 30 Ω
IR2 = A
6.Hard
R1​ = 10 ΩIR1​R3​ = 5 ΩR5​ = 3 Ω+−V1​10 VR2​6 ΩAR4​4 ΩBR6​4 Ω

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

V1 = 10 VR1 = 10 ΩR2 = 6 ΩR3 = 5 ΩR4 = 4 ΩR5 = 3 ΩR6 = 4 Ω
IR1 = A

Answer key

  1. 1. IR1 = 7.5 A
  2. 2. Req = 5.5 Ω
  3. 3. IR2 = 0.1463 A
  4. 4. IR1 = 1.556 A
  5. 5. IR2 = 0.5654 A
  6. 6. IR1 = 0.7495 A

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