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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 641 · 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.🧮 Three equal 300 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) always zero (b) their sum (c) less than either one (d) more than either one
  3. 3.🧮 Resistors of 22 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  4. 4.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 Resistors of 470 Ω, 20 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  6. 6.🧮 Resistors of 22 Ω, 68 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  7. 7.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 Resistors of 470 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  9. 9.🧮 A 2.2 V battery is joined to 8 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  10. 10.🧮 Adding another resistor in series makes the total resistance … (a) smaller (b) zero (c) bigger (d) stay the same
  11. 11.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 A 2.75 V battery is joined to 6 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  13. 13.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 Resistors of 150 Ω, 10 Ω, 220 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 A 47 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)?
  18. 18.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  19. 19.🧮 A 2.8 V battery is joined to 10 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  20. 20.🧮 Resistors of 68 Ω, 330 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  21. 21.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 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)?
  23. 23.🧮 A 22 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)?
  24. 24.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  25. 25.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 A 150 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)?
  27. 27.🧮 Resistors of 150 Ω, 470 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 Resistors of 20 Ω, 47 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 A 220 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)?
  31. 31.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 A 5 V battery is joined to 8 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  33. 33.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 A 22 Ω resistor is joined in series with two equal 220 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  35. 35.🧮 Resistors of 22 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 Resistors of 20 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 A 3.4 V battery is joined to 12 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  39. 39.🧮 A 3.75 V battery is joined to 3 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  40. 40.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. 100
  2. less than either one
  3. 44
  4. 5
  5. 820
  6. 158
  7. 50
  8. 503
  9. 0.2
  10. bigger
  11. 100
  12. 0.25
  13. 500
  14. 110
  15. 390
  16. 10
  17. 147
  18. 20
  19. 0.2
  20. 418
  21. 5
  22. 47
  23. 72
  24. 20
  25. 10
  26. 315
  27. 840
  28. 25
  29. 117
  30. 225
  31. 235
  32. 0.25
  33. 50
  34. 132
  35. 122
  36. 100
  37. 88
  38. 0.2
  39. 0.25
  40. 10

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