Series-Parallel Circuits — Engineering Board Exam Practice Questions

26 free engineering board exam reviewer questions on Series-Parallel Circuits (DC Circuits), each with the correct answer and a worked solution.

  1. A 6, resistor and a 3, resistor are connected in parallel, and this pair is in series with a 4, resistor. The whole network dissipates 150…
  2. Three identical lamps are connected so that two of them are in parallel, and this pair is in series with the third lamp, all across a…
  3. In the bridge circuit shown, V=12 V, R1=10, , R2=40, , R3=100, , and R4=800, . The detector R5 is removed (open circuit between B and C)…
  4. In the ladder network shown, V=25 V, R1=10, , R2=20, , R3=51, , and R4=9, . Find the voltage at point B with respect to the negative…
  5. In the circuit shown, V=120 V, R1=12, , R2=12, , R3=8, , and R4=30, . Find the voltage across R2.
  6. In the circuit shown, V=9 V, R1=10, , R2=10, , and RL=40, . By how many volts does the voltage across R2 fall when the load RL is…
  7. A voltage divider uses R1=R2=10 k across a 12 V source. A 10 k load is connected across R2. What is the output voltage across the load?
  8. A 10, resistor is connected in series with two 20, resistors that are in parallel with each other. What is the total resistance?
  9. The Wheatstone bridge shown is balanced. V=24 V, R1=30, , R2=90, , R3=20, , R4=60, , and R5=500, . Find the total resistance seen by the…
  10. The Wheatstone bridge shown is balanced (no current flows through R5, the detector). V=24 V, R1=20, , R2=60, , R3=30, , and R5=200, . Find…
  11. In the ladder network shown, V=30 V, R1=6, , R2=6, , R3=3, , and R4=9, . Find the current through R3.
  12. In the ladder network shown, V=4 V, R1=10, , R2=15, , R3=7, , and R4=3, . Find the voltage at point A with respect to the negative…
  13. In the ladder network shown, V=18 V, R1=12, , R2=40, , R3=55, , and R4=5, . Find the total resistance seen by the source.
  14. In the circuit shown, V=30 V, R1=10, , R2=6, , R3=9, , and R4=30, . Find the current through R4.
  15. In the circuit shown, V=23 V, R1=20, , R2=7, , R3=5, , and R4=4, . Find the total current supplied by the source.
  16. In the circuit shown, V=18 V, R1=8, , R2=3, , R3=3, , and R4=12, . Find the total resistance seen by the source.
  17. In the circuit shown, V=128 V, R1=20, , R2=30, , and RL=20, . Find the voltage across the load RL.
  18. In the circuit shown, V=60 V, R1=20, , R2=20, , and RL=5, . Find the voltage across the load RL.
  19. In the series-parallel circuit shown, V=56 V, R1=6, , R2=10, , and R3=40, . Find the total power dissipated in the circuit.
  20. In the series-parallel circuit shown, V=115 V, R1=8, , R2=60, , and R3=20, . How much power is dissipated by R2?
  21. In the series-parallel circuit shown, V=60 V, R1=10, , R2=30, , and R3=15, . Find the current through R3.
  22. In the series-parallel circuit shown, V=90 V, R1=6, , R2=40, , and R3=60, . Find the voltage across the parallel combination of R2 and R3.
  23. In the series-parallel circuit shown, V=108 V, R1=15, , R2=30, , and R3=20, . Find the voltage across R1.
  24. In the series-parallel circuit shown, V=6 V, R1=20, , R2=20, , and R3=5, . Find the total current supplied by the source.
  25. In the series-parallel circuit shown, V=28 V, R1=20, , R2=40, , and R3=10, . Find the total resistance seen by the source.
  26. In the series-parallel circuit shown, V=42 V, R1=6, , R2=20, , and R3=60, . Find the total resistance seen by the source.