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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 138 · 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 10 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) their sum (b) less than either one (c) always zero (d) more than either one
  3. 3.🧮 Adding another resistor in series makes the total resistance … (a) bigger (b) smaller (c) zero (d) stay the same
  4. 4.🧮 Resistors of 47 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  5. 5.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  6. 6.🧮 Resistors of 470 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  7. 7.🧮 A 10 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.🧮 Resistors of 50 Ω, 330 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  9. 9.🧮 Resistors of 330 Ω, 20 Ω, 47 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 Resistors of 33 Ω, 100 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 An 11 V battery is joined to 8 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  14. 14.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 Resistors of 33 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 A 9 V battery is joined to 6 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 Resistors of 22 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 Resistors of 22 Ω, 220 Ω, 10 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  20. 20.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 Resistors of 220 Ω, 100 Ω, 10 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 Resistors of 10 Ω, 470 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 Resistors of 50 Ω, 22 Ω, 22 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  25. 25.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 A 3 V battery is joined to 2 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  27. 27.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  28. 28.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 A 5.5 V battery is joined to 3 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  30. 30.🧮 A 22 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)?
  31. 31.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 An 18 V battery is joined to 12 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  33. 33.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 An 11 V battery is joined to 5 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  36. 36.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 An 8 V battery is joined to 2 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  38. 38.🧮 A 20 Ω resistor is joined in series with two equal 1000 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  39. 39.🧮 Resistors of 22 Ω, 22 Ω, 100 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  40. 40.🧮 A 1.4 V battery is joined to 3 Ω and 4 Ω resistors in series. What current flows (in amperes)? =

Answer key

  1. 5
  2. less than either one
  3. bigger
  4. 115
  5. 20
  6. 503
  7. 30
  8. 850
  9. 444
  10. 180
  11. 10
  12. 25
  13. 1
  14. 20
  15. 50
  16. 43
  17. 1
  18. 122
  19. 320
  20. 25
  21. 660
  22. 527
  23. 244
  24. 5
  25. 50
  26. 0.5
  27. 235
  28. 100
  29. 0.5
  30. 122
  31. 50
  32. 1
  33. 100
  34. 20
  35. 1
  36. 100
  37. 1
  38. 520
  39. 294
  40. 0.2

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