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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 701 · 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.🧮 Two resistors in parallel give a total that is … (a) less than either one (b) always zero (c) their sum (d) more than either one
  3. 3.🧮 A 47 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.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 Resistors of 150 Ω, 50 Ω, 10 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  6. 6.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 Resistors of 330 Ω, 47 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  8. 8.🧮 Resistors of 330 Ω, 33 Ω, 22 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  9. 9.🧮 A 5 V battery is joined to 2 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  10. 10.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 Resistors of 100 Ω, 20 Ω, 50 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  13. 13.🧮 Adding another resistor in series makes the total resistance … (a) bigger (b) stay the same (c) smaller (d) zero
  14. 14.🧮 A 2.4 V battery is joined to 8 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  15. 15.🧮 Resistors of 50 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 A 3 V battery is joined to 2 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  17. 17.🧮 A 0.5 V battery is joined to 3 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 Resistors of 20 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 A 330 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)?
  20. 20.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 Resistors of 150 Ω, 68 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 A 50 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)?
  25. 25.🧮 Resistors of 33 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 A 20 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)?
  27. 27.🧮 Resistors of 100 Ω, 470 Ω, 47 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 Resistors of 150 Ω, 220 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  29. 29.🧮 Resistors of 470 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 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)?
  32. 32.🧮 Resistors of 150 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 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)?
  34. 34.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 A 6 V battery is joined to 4 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  38. 38.🧮 A 2.4 V battery is joined to 2 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  39. 39.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  40. 40.🧮 Resistors of 50 Ω, 22 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. 50
  2. less than either one
  3. 57
  4. 5
  5. 257
  6. 25
  7. 424
  8. 715
  9. 1
  10. 50
  11. 25
  12. 203
  13. bigger
  14. 0.2
  15. 200
  16. 0.5
  17. 0.1
  18. 240
  19. 495
  20. 20
  21. 100
  22. 165
  23. 268
  24. 70
  25. 80
  26. 25
  27. 667
  28. 392
  29. 492
  30. 25
  31. 350
  32. 620
  33. 315
  34. 10
  35. 5
  36. 10
  37. 1
  38. 0.2
  39. 5
  40. 92

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