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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 730 · 40 questions
TalentJR

Remember (Add in a row, share side by side): Series: R total = R1 + R2 + R3 … Parallel, equal resistors: R total = R ÷ number of resistors (two equal → half). Then I = V ÷ R total. Example: 6 V across 4 Ω + 8 Ω = 12 Ω → 0.5 A.

NameDateTime takenScore ___ / 40
  1. 1.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 Two resistors in parallel give a total that is … (a) more than either one (b) their sum (c) always zero (d) less than either one
  3. 3.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  4. 4.🧮 Resistors of 68 Ω, 50 Ω, 33 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  5. 5.🧮 Resistors of 20 Ω, 22 Ω, 20 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  6. 6.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 A 100 Ω resistor is joined in series with two equal 40 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  8. 8.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 A 1.25 V battery is joined to 3 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  12. 12.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 A 5.5 V battery is joined to 8 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  14. 14.🧮 A 33 Ω resistor is joined in series with two equal 470 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  15. 15.🧮 A 9 V battery is joined to 10 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  16. 16.🧮 A 470 Ω resistor is joined in series with two equal 10 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  17. 17.🧮 Resistors of 20 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  18. 18.🧮 Adding another resistor in series makes the total resistance … (a) bigger (b) stay the same (c) zero (d) smaller
  19. 19.🧮 A 50 Ω resistor is joined in series with two equal 330 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  20. 20.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 A 20 Ω resistor is joined in series with two equal 40 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  22. 22.🧮 Resistors of 150 Ω, 470 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 Resistors of 50 Ω, 20 Ω, 150 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 Resistors of 33 Ω, 47 Ω, 150 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 A 2 V battery is joined to 6 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  26. 26.🧮 A 1.75 V battery is joined to 5 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  27. 27.🧮 Resistors of 220 Ω, 33 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 A 4 V battery is joined to 8 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  30. 30.🧮 Resistors of 150 Ω, 50 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 Resistors of 330 Ω, 330 Ω, 330 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 A 22 Ω resistor is joined in series with two equal 40 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  35. 35.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 A 68 Ω resistor is joined in series with two equal 50 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  37. 37.🧮 Resistors of 220 Ω, 100 Ω, 33 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 A 2.2 V battery is joined to 3 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  40. 40.🧮 A 0.9 V battery is joined to 4 Ω and 5 Ω resistors in series. What current flows (in amperes)? =

Answer key

  1. 10
  2. less than either one
  3. 5
  4. 201
  5. 109
  6. 100
  7. 120
  8. 25
  9. 500
  10. 100
  11. 0.25
  12. 50
  13. 0.5
  14. 268
  15. 0.5
  16. 475
  17. 88
  18. bigger
  19. 215
  20. 5
  21. 40
  22. 653
  23. 440
  24. 700
  25. 0.25
  26. 0.25
  27. 473
  28. 100
  29. 0.25
  30. 210
  31. 5
  32. 25
  33. 1040
  34. 42
  35. 50
  36. 93
  37. 363
  38. 50
  39. 0.2
  40. 0.1

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