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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 148 · 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.🧮 Adding another resistor in series makes the total resistance … (a) smaller (b) zero (c) bigger (d) stay the same
  2. 2.🧮 A 1.8 V battery is joined to 3 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  3. 3.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  4. 4.🧮 A 3 V battery is joined to 4 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  5. 5.🧮 A 150 Ω resistor is joined in series with two equal 100 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  6. 6.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 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
  9. 9.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 A 150 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)?
  12. 12.🧮 Resistors of 10 Ω, 20 Ω, 10 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  13. 13.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 A 2 V battery is joined to 2 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  15. 15.🧮 A 3.5 V battery is joined to 4 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  16. 16.🧮 Resistors of 20 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 Resistors of 20 Ω, 20 Ω, 22 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 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)?
  21. 21.🧮 Four equal 20 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.🧮 A 2 V battery is joined to 10 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  24. 24.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  25. 25.🧮 A 470 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)?
  26. 26.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 A 20 V battery is joined to 10 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  28. 28.🧮 Resistors of 330 Ω, 330 Ω, 10 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  29. 29.🧮 A 4 V battery is joined to 4 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  30. 30.🧮 Resistors of 47 Ω, 47 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 A 3 V battery is joined to 2 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  33. 33.🧮 A 3 V battery is joined to 10 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  34. 34.🧮 A 330 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)?
  35. 35.🧮 Resistors of 470 Ω, 33 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 A 100 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)?
  37. 37.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 Resistors of 47 Ω, 330 Ω, 150 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 A 5 V battery is joined to 12 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  40. 40.🧮 Resistors of 150 Ω, 20 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. bigger
  2. 0.2
  3. 100
  4. 0.5
  5. 200
  6. 50
  7. 110
  8. less than either one
  9. 10
  10. 10
  11. 160
  12. 50
  13. 5
  14. 0.2
  15. 0.5
  16. 88
  17. 5
  18. 109
  19. 500
  20. 240
  21. 5
  22. 165
  23. 0.1
  24. 10
  25. 570
  26. 25
  27. 1
  28. 692
  29. 0.5
  30. 564
  31. 100
  32. 0.25
  33. 0.25
  34. 340
  35. 603
  36. 600
  37. 235
  38. 560
  39. 0.25
  40. 217

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