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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 443 · 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.🧮 A 24 V battery is joined to 12 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  2. 2.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 Resistors of 68 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  4. 4.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 Resistors of 100 Ω, 22 Ω, 10 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  6. 6.🧮 Two resistors in parallel give a total that is … (a) always zero (b) less than either one (c) their sum (d) more than either one
  7. 7.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) stay the same (c) smaller (d) bigger
  8. 8.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 An 11 V battery is joined to 5 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  10. 10.🧮 A 33 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)?
  11. 11.🧮 A 10 V battery is joined to 10 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  12. 12.🧮 An 18 V battery is joined to 10 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  13. 13.🧮 A 330 Ω resistor is joined in series with two equal 100 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  14. 14.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 Resistors of 10 Ω, 50 Ω, 150 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 Resistors of 20 Ω, 470 Ω, 33 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  18. 18.🧮 Resistors of 47 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 Resistors of 150 Ω, 33 Ω, 33 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  20. 20.🧮 Resistors of 10 Ω, 330 Ω, 47 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  21. 21.🧮 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)?
  22. 22.🧮 A 2.75 V battery is joined to 3 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  23. 23.🧮 A 1.1 V battery is joined to 6 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  24. 24.🧮 Resistors of 330 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 Resistors of 47 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  28. 28.🧮 A 220 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)?
  29. 29.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 A 150 Ω resistor is joined in series with two equal 200 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  33. 33.🧮 A 4.4 V battery is joined to 12 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  34. 34.🧮 Resistors of 330 Ω, 68 Ω, 150 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 A 1.2 V battery is joined to 2 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  36. 36.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 A 1.8 V battery is joined to 8 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  40. 40.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. 1
  2. 165
  3. 90
  4. 10
  5. 602
  6. less than either one
  7. bigger
  8. 100
  9. 1
  10. 38
  11. 0.5
  12. 1
  13. 380
  14. 20
  15. 278
  16. 100
  17. 743
  18. 97
  19. 226
  20. 717
  21. 350
  22. 0.25
  23. 0.1
  24. 377
  25. 20
  26. 67
  27. 235
  28. 230
  29. 25
  30. 50
  31. 5
  32. 250
  33. 0.2
  34. 581
  35. 0.2
  36. 20
  37. 50
  38. 25
  39. 0.1
  40. 50

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