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​ = 8 Ω+−V1​12 VR2​6 ΩAab

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

V1 = 12 VR1 = 8 ΩR2 = 6 Ω
IN = A
2.Easy
R1​ = 3 Ω+−V1​24 VR2​10 ΩAab

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

V1 = 24 VR1 = 3 ΩR2 = 10 Ω
Vth = V
3.Medium
R1​ = 10 ΩR3​ = 15 Ω+−V1​12 VR2​2 ΩAab

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

V1 = 12 VR1 = 10 ΩR2 = 2 ΩR3 = 15 Ω
Rth = Ω
4.Medium
R1​ = 2 ΩR3​ = 2 Ω+−V1​9 VR2​6 ΩARL​4 ΩIL​B

A load RL = 4 Ω is connected across a–b. Replace the rest of the circuit with its Thévenin equivalent and find the load current IL.

V1 = 9 VR1 = 2 ΩR2 = 6 ΩR3 = 2 ΩRL = 4 Ω
IL = A
5.Hard
R1​ = 2 ΩR3​ = 20 Ω+−V1​30 VR2​4 ΩAIs​2 ABRL​8 ΩIL​

A load RL = 8 Ω is connected across a–b. Use a Thévenin equivalent to find the power PL delivered to the load.

V1 = 30 VIs = 2 AR1 = 2 ΩR2 = 4 ΩR3 = 20 ΩRL = 8 Ω
PL = W
6.Hard
R1​ = 12 ΩR3​ = 4 Ω+−V1​9 VR2​15 ΩAIs​4 ABRL​30 ΩIL​

A load RL = 30 Ω is connected across a–b. Replace the rest of the circuit with its Thévenin equivalent and find the load current IL.

V1 = 9 VIs = 4 AR1 = 12 ΩR2 = 15 ΩR3 = 4 ΩRL = 30 Ω
IL = A

Answer key

  1. 1. IN = 1.5 A
  2. 2. Vth = 18.46 V
  3. 3. Rth = 16.67 Ω
  4. 4. IL = 0.9 A
  5. 5. PL = 36.51 W
  6. 6. IL = 1.172 A

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