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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 420 · 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 1.1 V battery is joined to 8 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  2. 2.🧮 Resistors of 20 Ω, 22 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  3. 3.🧮 Adding another resistor in series makes the total resistance … (a) smaller (b) bigger (c) zero (d) stay the same
  4. 4.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  6. 6.🧮 A 1.4 V battery is joined to 6 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  7. 7.🧮 A 100 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.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 Two resistors in parallel give a total that is … (a) more than either one (b) less than either one (c) always zero (d) their sum
  10. 10.🧮 Resistors of 33 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 A 4.5 V battery is joined to 8 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  12. 12.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 Resistors of 470 Ω, 22 Ω, 68 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 An 8 V battery is joined to 6 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  15. 15.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 Resistors of 10 Ω, 33 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 Resistors of 47 Ω, 22 Ω, 50 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  18. 18.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  19. 19.🧮 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)?
  20. 20.🧮 Resistors of 68 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  21. 21.🧮 Resistors of 33 Ω, 68 Ω, 33 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 Resistors of 47 Ω, 22 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 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)?
  24. 24.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  25. 25.🧮 Resistors of 220 Ω, 10 Ω, 68 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 Resistors of 10 Ω, 10 Ω, 47 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  28. 28.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 A 17 V battery is joined to 5 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  30. 30.🧮 Resistors of 33 Ω, 330 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 A 0.7 V battery is joined to 5 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  32. 32.🧮 A 1.75 V battery is joined to 4 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  33. 33.🧮 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)?
  34. 34.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 Resistors of 50 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 Resistors of 150 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 A 7.5 V battery is joined to 3 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  40. 40.🧮 A 1.6 V battery is joined to 4 Ω and 4 Ω resistors in series. What current flows (in amperes)? =

Answer key

  1. 0.1
  2. 92
  3. bigger
  4. 5
  5. 10
  6. 0.1
  7. 105
  8. 165
  9. less than either one
  10. 363
  11. 0.25
  12. 5
  13. 660
  14. 1
  15. 50
  16. 193
  17. 141
  18. 25
  19. 200
  20. 538
  21. 202
  22. 91
  23. 533
  24. 5
  25. 331
  26. 87
  27. 10
  28. 10
  29. 1
  30. 431
  31. 0.1
  32. 0.25
  33. 70
  34. 50
  35. 72
  36. 170
  37. 100
  38. 20
  39. 0.5
  40. 0.2

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