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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 327 · 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 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 A 220 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)?
  3. 3.🧮 A 100 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)?
  4. 4.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 Two resistors in parallel give a total that is … (a) always zero (b) less than either one (c) more than either one (d) their sum
  6. 6.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 Resistors of 330 Ω, 33 Ω, 68 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  8. 8.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 Resistors of 470 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 Adding another resistor in series makes the total resistance … (a) stay the same (b) bigger (c) smaller (d) zero
  12. 12.🧮 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)?
  13. 13.🧮 Resistors of 33 Ω, 47 Ω, 20 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 A 1.1 V battery is joined to 3 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  15. 15.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 Resistors of 330 Ω, 330 Ω, 68 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  18. 18.🧮 A 47 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)?
  19. 19.🧮 Four equal 20 Ω resistors are joined in parallel. 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.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  25. 25.🧮 Resistors of 10 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 A 7.5 V battery is joined to 10 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  27. 27.🧮 A 5 V battery is joined to 8 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  28. 28.🧮 A 1.4 V battery is joined to 2 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  29. 29.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 A 330 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)?
  31. 31.🧮 Resistors of 20 Ω, 20 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 Resistors of 33 Ω, 330 Ω, 47 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 Resistors of 68 Ω, 220 Ω, 10 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 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)?
  35. 35.🧮 Resistors of 68 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 An 18 V battery is joined to 10 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  37. 37.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 Resistors of 100 Ω, 22 Ω, 33 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  40. 40.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. 50
  2. 270
  3. 110
  4. 20
  5. less than either one
  6. 20
  7. 531
  8. 235
  9. 503
  10. 100
  11. bigger
  12. 225
  13. 122
  14. 0.1
  15. 20
  16. 5
  17. 828
  18. 547
  19. 5
  20. 5
  21. 50
  22. 50
  23. 25
  24. 5
  25. 230
  26. 0.5
  27. 0.5
  28. 0.2
  29. 10
  30. 355
  31. 73
  32. 443
  33. 448
  34. 30
  35. 88
  36. 1
  37. 25
  38. 175
  39. 165
  40. 500

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