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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 813 · 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 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 Resistors of 22 Ω, 33 Ω, 20 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  4. 4.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 Adding another resistor in series makes the total resistance … (a) bigger (b) zero (c) stay the same (d) smaller
  6. 6.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 A 68 Ω resistor is joined in series with two equal 20 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  8. 8.🧮 Resistors of 22 Ω, 50 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  9. 9.🧮 Resistors of 220 Ω, 470 Ω, 20 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 A 330 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)?
  13. 13.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 Resistors of 33 Ω, 150 Ω, 47 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  15. 15.🧮 Resistors of 10 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 An 8.5 V battery is joined to 12 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  17. 17.🧮 Two resistors in parallel give a total that is … (a) their sum (b) always zero (c) more than either one (d) less than either one
  18. 18.🧮 Resistors of 47 Ω, 220 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 A 330 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)?
  21. 21.🧮 A 2.8 V battery is joined to 6 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  22. 22.🧮 Resistors of 10 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 A 33 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)?
  24. 24.🧮 A 22 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)?
  25. 25.🧮 A 4.5 V battery is joined to 6 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  26. 26.🧮 Resistors of 220 Ω, 220 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  28. 28.🧮 Resistors of 150 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  29. 29.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 A 12 V battery is joined to 2 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  31. 31.🧮 Resistors of 22 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 A 3.75 V battery is joined to 5 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  33. 33.🧮 A 0.7 V battery is joined to 5 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  34. 34.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 A 1.75 V battery is joined to 5 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  37. 37.🧮 Resistors of 50 Ω, 330 Ω, 68 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 Resistors of 100 Ω, 68 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 Resistors of 47 Ω, 10 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  40. 40.🧮 Resistors of 100 Ω, 220 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. 20
  2. 25
  3. 175
  4. 5
  5. bigger
  6. 165
  7. 78
  8. 82
  9. 1040
  10. 20
  11. 5
  12. 350
  13. 50
  14. 560
  15. 78
  16. 0.5
  17. less than either one
  18. 277
  19. 10
  20. 565
  21. 0.2
  22. 30
  23. 53
  24. 47
  25. 0.25
  26. 660
  27. 50
  28. 197
  29. 5
  30. 1
  31. 90
  32. 0.25
  33. 0.1
  34. 235
  35. 100
  36. 0.25
  37. 516
  38. 215
  39. 77
  40. 650

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