Thévenin & Norton worksheet with answers

Free printable Thévenin & Norton 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​ = 3 Ω+−V1​24 VR2​8 ΩAab

Find the Thévenin voltage Vth seen from terminals a–b.

V1 = 24 VR1 = 3 ΩR2 = 8 Ω
Vth = V
2.Easy
R1​ = 4 Ω+−V1​20 VR2​10 ΩAab

Find the Norton current IN: the current that flows from a to b if the terminals are shorted.

V1 = 20 VR1 = 4 ΩR2 = 10 Ω
IN = A
3.Medium
R1​ = 12 ΩR3​ = 15 Ω+−V1​24 VR2​12 ΩARL​2 ΩIL​B

A load RL = 2 Ω is connected across a–b. Replace the rest of the circuit with its Thévenin equivalent and find the load current IL.

V1 = 24 VR1 = 12 ΩR2 = 12 ΩR3 = 15 ΩRL = 2 Ω
IL = A
4.Medium
R1​ = 5 ΩR3​ = 12 Ω+−V1​9 VR2​4 ΩAab

Find the Thévenin resistance Rth seen from terminals a–b.

V1 = 9 VR1 = 5 ΩR2 = 4 ΩR3 = 12 Ω
Rth = Ω
5.Hard
R1​ = 20 ΩR3​ = 10 Ω+−V1​15 VR2​8 ΩAIs​4 ABRL​25 ΩIL​

A load RL = 25 Ω is connected across a–b. Replace the rest of the circuit with its Thévenin equivalent and find the load current IL.

V1 = 15 VIs = 4 AR1 = 20 ΩR2 = 8 ΩR3 = 10 ΩRL = 25 Ω
IL = A
6.Hard
R1​ = 15 ΩR3​ = 25 Ω+−V1​36 VR2​6 ΩAIs​1 ABRL​8 ΩIL​

A load RL = 8 Ω is connected across a–b. Replace the rest of the circuit with its Thévenin equivalent and find the load current IL.

V1 = 36 VIs = 1 AR1 = 15 ΩR2 = 6 ΩR3 = 25 ΩRL = 8 Ω
IL = A

Answer key

  1. 1. Vth = 17.45 V
  2. 2. IN = 5 A
  3. 3. IL = 0.5217 A
  4. 4. Rth = 14.22 Ω
  5. 5. IL = 1.649 A
  6. 6. IL = 1.061 A

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