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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 437 · 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 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)?
  2. 2.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 A 5 V battery is joined to 2 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  4. 4.🧮 Adding another resistor in series makes the total resistance … (a) stay the same (b) bigger (c) zero (d) smaller
  5. 5.🧮 A 0.8 V battery is joined to 2 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  6. 6.🧮 Resistors of 10 Ω and 22 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.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 Resistors of 20 Ω, 470 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 Resistors of 47 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 Resistors of 68 Ω, 33 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  12. 12.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 Five equal 50 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.🧮 A 5.5 V battery is joined to 12 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  16. 16.🧮 Resistors of 10 Ω, 50 Ω, 22 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  19. 19.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 Resistors of 100 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  21. 21.🧮 A 220 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)?
  22. 22.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 A 220 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)?
  24. 24.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  25. 25.🧮 A 1.5 V battery is joined to 3 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  26. 26.🧮 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
  27. 27.🧮 Resistors of 10 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 Resistors of 10 Ω, 47 Ω, 220 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  29. 29.🧮 A 470 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)?
  30. 30.🧮 Resistors of 470 Ω, 10 Ω, 47 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 Resistors of 22 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 Resistors of 47 Ω, 22 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 A 9 V battery is joined to 4 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  36. 36.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 Resistors of 22 Ω, 20 Ω and 100 Ω are joined in series. 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.🧮 Resistors of 50 Ω, 50 Ω, 10 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  40. 40.🧮 Resistors of 150 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. 350
  2. 20
  3. 0.5
  4. bigger
  5. 0.2
  6. 32
  7. 50
  8. 100
  9. 590
  10. 80
  11. 151
  12. 25
  13. 10
  14. 110
  15. 0.25
  16. 92
  17. 100
  18. 5
  19. 5
  20. 150
  21. 385
  22. 20
  23. 720
  24. 5
  25. 0.25
  26. less than either one
  27. 160
  28. 297
  29. 970
  30. 577
  31. 42
  32. 10
  33. 79
  34. 20
  35. 1
  36. 50
  37. 142
  38. 25
  39. 120
  40. 250

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