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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 103 · 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.

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  1. 1.🧮 A 3.5 V battery is joined to 6 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  2. 2.🧮 A 13 V battery is joined to 5 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  3. 3.🧮 Resistors of 33 Ω, 47 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  4. 4.🧮 A 4.5 V battery is joined to 4 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  5. 5.🧮 Resistors of 47 Ω, 470 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  6. 6.🧮 Adding another resistor in series makes the total resistance … (a) stay the same (b) zero (c) smaller (d) bigger
  7. 7.🧮 Two resistors in parallel give a total that is … (a) more than either one (b) their sum (c) always zero (d) less than either one
  8. 8.🧮 Resistors of 10 Ω, 220 Ω, 22 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  9. 9.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 Resistors of 220 Ω, 150 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 A 10 V battery is joined to 5 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  12. 12.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 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)?
  14. 14.🧮 A 1.2 V battery is joined to 4 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  15. 15.🧮 Resistors of 50 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 Resistors of 50 Ω, 220 Ω, 10 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 A 1.2 V battery is joined to 2 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 Resistors of 150 Ω, 50 Ω, 330 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 Resistors of 33 Ω, 10 Ω, 33 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  20. 20.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 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)?
  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.🧮 Resistors of 330 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 Five equal 250 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 470 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  26. 26.🧮 Resistors of 470 Ω, 470 Ω, 470 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 Resistors of 100 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 Resistors of 33 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 Resistors of 20 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 A 20 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)?
  33. 33.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 A 3 V battery is joined to 5 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  36. 36.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 A 6.5 V battery is joined to 3 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  40. 40.🧮 Resistors of 220 Ω, 33 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. 0.25
  2. 1
  3. 410
  4. 0.5
  5. 567
  6. bigger
  7. less than either one
  8. 285
  9. 25
  10. 470
  11. 1
  12. 20
  13. 38
  14. 0.1
  15. 100
  16. 750
  17. 0.2
  18. 750
  19. 109
  20. 50
  21. 122
  22. 187
  23. 352
  24. 50
  25. 705
  26. 1478
  27. 150
  28. 10
  29. 133
  30. 53
  31. 5
  32. 130
  33. 100
  34. 165
  35. 0.2
  36. 20
  37. 100
  38. 50
  39. 0.5
  40. 583

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