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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 717 · 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.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 A 50 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)?
  3. 3.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  4. 4.🧮 A 1.75 V battery is joined to 3 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  5. 5.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  6. 6.🧮 Resistors of 100 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  7. 7.🧮 A 1.8 V battery is joined to 10 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  8. 8.🧮 A 330 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)?
  9. 9.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) smaller (c) bigger (d) stay the same
  10. 10.🧮 A 20 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)?
  11. 11.🧮 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)?
  12. 12.🧮 Two resistors in parallel give a total that is … (a) more than either one (b) always zero (c) their sum (d) less than either one
  13. 13.🧮 A 1.6 V battery is joined to 8 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  14. 14.🧮 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)?
  15. 15.🧮 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)?
  16. 16.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 A 470 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)?
  19. 19.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 Resistors of 150 Ω, 150 Ω, 47 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  21. 21.🧮 Resistors of 22 Ω, 68 Ω, 220 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 Resistors of 10 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 A 17 V battery is joined to 12 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  24. 24.🧮 A 68 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)?
  25. 25.🧮 A 10 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)?
  26. 26.🧮 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)?
  27. 27.🧮 Resistors of 100 Ω, 68 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 Resistors of 20 Ω and 50 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.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 A 0.9 V battery is joined to 3 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  35. 35.🧮 A 7 V battery is joined to 8 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  36. 36.🧮 Resistors of 20 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 Resistors of 47 Ω, 47 Ω, 50 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 A 1.4 V battery is joined to 6 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  39. 39.🧮 Resistors of 22 Ω, 100 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  40. 40.🧮 Resistors of 470 Ω, 22 Ω, 10 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. 10
  2. 215
  3. 20
  4. 0.25
  5. 110
  6. 168
  7. 0.1
  8. 355
  9. bigger
  10. 255
  11. 240
  12. less than either one
  13. 0.1
  14. 78
  15. 52
  16. 5
  17. 100
  18. 475
  19. 165
  20. 369
  21. 332
  22. 20
  23. 1
  24. 303
  25. 20
  26. 27
  27. 188
  28. 25
  29. 10
  30. 70
  31. 100
  32. 50
  33. 25
  34. 0.1
  35. 0.5
  36. 53
  37. 194
  38. 0.1
  39. 144
  40. 652

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