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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 801 · 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 resistors in parallel give a total that is … (a) their sum (b) less than either one (c) more than either one (d) always zero
  2. 2.🧮 Resistors of 50 Ω, 33 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  3. 3.🧮 Adding another resistor in series makes the total resistance … (a) stay the same (b) bigger (c) smaller (d) zero
  4. 4.🧮 A 100 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)?
  5. 5.🧮 Resistors of 33 Ω, 330 Ω, 47 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  6. 6.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 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)?
  8. 8.🧮 Resistors of 330 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  9. 9.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 A 68 Ω resistor is joined in series with two equal 470 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  11. 11.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 A 1 V battery is joined to 2 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  13. 13.🧮 Resistors of 100 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 A 33 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)?
  15. 15.🧮 A 2 V battery is joined to 4 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  16. 16.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 Resistors of 20 Ω, 47 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 Resistors of 10 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  20. 20.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 A 33 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)?
  23. 23.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  25. 25.🧮 Resistors of 33 Ω, 68 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  28. 28.🧮 A 150 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)?
  29. 29.🧮 Resistors of 100 Ω, 22 Ω, 10 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 Resistors of 20 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 Resistors of 330 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 A 5.5 V battery is joined to 6 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  34. 34.🧮 A 10 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)?
  35. 35.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 A 68 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 50 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  40. 40.🧮 A 2.25 V battery is joined to 4 Ω and 5 Ω resistors in series. What current flows (in amperes)? =

Answer key

  1. less than either one
  2. 233
  3. bigger
  4. 200
  5. 432
  6. 20
  7. 38
  8. 480
  9. 50
  10. 303
  11. 100
  12. 0.1
  13. 122
  14. 58
  15. 0.25
  16. 5
  17. 100
  18. 397
  19. 60
  20. 50
  21. 25
  22. 533
  23. 20
  24. 25
  25. 151
  26. 25
  27. 165
  28. 650
  29. 165
  30. 5
  31. 490
  32. 350
  33. 0.5
  34. 510
  35. 20
  36. 5
  37. 10
  38. 568
  39. 380
  40. 0.25

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