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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 667 · 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 100 Ω, 10 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  2. 2.🧮 An 8.5 V battery is joined to 12 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  3. 3.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  4. 4.🧮 Resistors of 50 Ω, 33 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  5. 5.🧮 Three equal 75 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) smaller (b) bigger (c) zero (d) stay the same
  7. 7.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 Resistors of 330 Ω, 330 Ω, 150 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 A 3.25 V battery is joined to 3 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  11. 11.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 Two resistors in parallel give a total that is … (a) more than either one (b) their sum (c) less than either one (d) always zero
  13. 13.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 Resistors of 68 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  15. 15.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 A 9 V battery is joined to 3 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  17. 17.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 An 8 V battery is joined to 4 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  19. 19.🧮 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)?
  20. 20.🧮 Resistors of 470 Ω, 330 Ω, 68 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  21. 21.🧮 A 20 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)?
  22. 22.🧮 A 22 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)?
  23. 23.🧮 A 68 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.🧮 A 0.8 V battery is joined to 5 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  25. 25.🧮 Resistors of 10 Ω, 10 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 A 220 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.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  28. 28.🧮 A 1.1 V battery is joined to 8 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  29. 29.🧮 Resistors of 10 Ω, 33 Ω, 10 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 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)?
  31. 31.🧮 An 18 V battery is joined to 12 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  32. 32.🧮 A 1.8 V battery is joined to 5 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  33. 33.🧮 A 4.5 V battery is joined to 12 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  34. 34.🧮 An 8 V battery is joined to 5 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  35. 35.🧮 A 33 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.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 A 47 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)?
  38. 38.🧮 A 47 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)?
  39. 39.🧮 A 0.9 V battery is joined to 5 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  40. 40.🧮 Resistors of 150 Ω, 68 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. 440
  2. 0.5
  3. 25
  4. 103
  5. 25
  6. bigger
  7. 10
  8. 5
  9. 1030
  10. 0.25
  11. 20
  12. less than either one
  13. 165
  14. 218
  15. 235
  16. 1
  17. 50
  18. 1
  19. 25
  20. 968
  21. 40
  22. 187
  23. 233
  24. 0.1
  25. 30
  26. 240
  27. 10
  28. 0.1
  29. 86
  30. 27
  31. 1
  32. 0.2
  33. 0.25
  34. 1
  35. 268
  36. 100
  37. 52
  38. 72
  39. 0.1
  40. 318

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