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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 652 · 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.🧮 Resistors of 68 Ω, 10 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  2. 2.🧮 Resistors of 150 Ω, 50 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  3. 3.🧮 A 4 V battery is joined to 4 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  4. 4.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  6. 6.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) smaller (c) bigger (d) stay the same
  7. 7.🧮 Resistors of 150 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  8. 8.🧮 A 4 V battery is joined to 6 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  9. 9.🧮 Resistors of 33 Ω, 150 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 A 220 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)?
  11. 11.🧮 A 4.5 V battery is joined to 5 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  12. 12.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 A 22 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)?
  14. 14.🧮 Two resistors in parallel give a total that is … (a) more than either one (b) always zero (c) less than either one (d) their sum
  15. 15.🧮 A 1.5 V battery is joined to 12 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  16. 16.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 A 0.6 V battery is joined to 2 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  19. 19.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 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)?
  22. 22.🧮 Resistors of 150 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 A 20 V battery is joined to 8 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  24. 24.🧮 Resistors of 33 Ω, 470 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 A 68 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)?
  27. 27.🧮 A 20 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)?
  28. 28.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 Resistors of 50 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 Resistors of 33 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 Resistors of 150 Ω, 22 Ω, 10 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 Resistors of 470 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  40. 40.🧮 Resistors of 50 Ω, 33 Ω, 220 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. 98
  2. 420
  3. 0.5
  4. 25
  5. 100
  6. bigger
  7. 160
  8. 0.25
  9. 193
  10. 230
  11. 0.5
  12. 25
  13. 27
  14. less than either one
  15. 0.1
  16. 500
  17. 0.1
  18. 10
  19. 50
  20. 235
  21. 315
  22. 250
  23. 1
  24. 550
  25. 5
  26. 78
  27. 30
  28. 20
  29. 5
  30. 20
  31. 520
  32. 66
  33. 512
  34. 517
  35. 100
  36. 10
  37. 50
  38. 50
  39. 20
  40. 350

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