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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 444 · 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 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 Adding another resistor in series makes the total resistance … (a) bigger (b) smaller (c) zero (d) stay the same
  4. 4.🧮 Two resistors in parallel give a total that is … (a) their sum (b) always zero (c) more than either one (d) less than either one
  5. 5.🧮 A 68 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)?
  6. 6.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 Resistors of 50 Ω, 33 Ω, 22 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 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)?
  15. 15.🧮 Resistors of 22 Ω, 10 Ω, 330 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 Resistors of 10 Ω, 47 Ω, 470 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 Resistors of 330 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 Resistors of 50 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  20. 20.🧮 Resistors of 33 Ω, 68 Ω, 330 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  21. 21.🧮 Resistors of 68 Ω, 10 Ω, 330 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 Resistors of 100 Ω, 10 Ω, 50 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 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)?
  24. 24.🧮 Resistors of 33 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 Resistors of 10 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 A 150 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)?
  27. 27.🧮 Resistors of 47 Ω, 33 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 Resistors of 20 Ω, 50 Ω, 470 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 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)?
  32. 32.🧮 A 2.25 V battery is joined to 6 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  33. 33.🧮 A 100 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)?
  34. 34.🧮 Resistors of 50 Ω, 220 Ω, 470 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 A 22 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)?
  36. 36.🧮 Resistors of 22 Ω, 22 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 Resistors of 20 Ω, 10 Ω, 330 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 Resistors of 20 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 A 1.2 V battery is joined to 4 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  40. 40.🧮 Resistors of 22 Ω, 470 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. 20
  2. 50
  3. bigger
  4. less than either one
  5. 88
  6. 165
  7. 10
  8. 110
  9. 10
  10. 125
  11. 25
  12. 100
  13. 10
  14. 38
  15. 512
  16. 549
  17. 20
  18. 340
  19. 72
  20. 499
  21. 628
  22. 180
  23. 315
  24. 53
  25. 30
  26. 170
  27. 130
  28. 5
  29. 573
  30. 50
  31. 122
  32. 0.25
  33. 265
  34. 790
  35. 257
  36. 514
  37. 580
  38. 53
  39. 0.1
  40. 642

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