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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 118 · 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.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 A 2.8 V battery is joined to 2 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  3. 3.🧮 Two resistors in parallel give a total that is … (a) their sum (b) always zero (c) more than either one (d) less than either one
  4. 4.🧮 A 0.4 V battery is joined to 2 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  5. 5.🧮 Adding another resistor in series makes the total resistance … (a) stay the same (b) smaller (c) zero (d) bigger
  6. 6.🧮 A 33 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)?
  7. 7.🧮 Resistors of 68 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  8. 8.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 A 33 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)?
  12. 12.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 A 33 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.🧮 Resistors of 47 Ω, 22 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 A 2.8 V battery is joined to 8 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 Resistors of 220 Ω, 50 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 A 47 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)?
  20. 20.🧮 Resistors of 20 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  21. 21.🧮 A 4 V battery is joined to 6 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  22. 22.🧮 A 2 V battery is joined to 3 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  23. 23.🧮 Resistors of 470 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 A 2.5 V battery is joined to 3 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  25. 25.🧮 A 4 V battery is joined to 12 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  26. 26.🧮 Four equal 20 Ω resistors are joined in parallel. 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.🧮 A 150 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)?
  29. 29.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 Resistors of 47 Ω, 10 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 Resistors of 330 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 A 1.1 V battery is joined to 8 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  34. 34.🧮 Resistors of 20 Ω, 470 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 Resistors of 68 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 A 50 Ω resistor is joined in series with two equal 220 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  38. 38.🧮 A 22 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)?
  39. 39.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  40. 40.🧮 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)?

Answer key

  1. 10
  2. 0.2
  3. less than either one
  4. 0.1
  5. bigger
  6. 198
  7. 115
  8. 50
  9. 25
  10. 100
  11. 133
  12. 25
  13. 5
  14. 5
  15. 38
  16. 289
  17. 0.2
  18. 317
  19. 282
  20. 53
  21. 0.5
  22. 0.25
  23. 490
  24. 0.5
  25. 0.2
  26. 5
  27. 10
  28. 155
  29. 20
  30. 500
  31. 77
  32. 480
  33. 0.1
  34. 540
  35. 118
  36. 20
  37. 160
  38. 122
  39. 5
  40. 303

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