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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 39 · 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 6.5 V battery is joined to 8 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  2. 2.🧮 A 7 V battery is joined to 6 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  3. 3.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  4. 4.🧮 Resistors of 33 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  5. 5.🧮 Resistors of 50 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  6. 6.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) stay the same (c) bigger (d) smaller
  7. 7.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 Resistors of 33 Ω, 22 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  9. 9.🧮 A 0.6 V battery is joined to 3 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  10. 10.🧮 A 0.5 V battery is joined to 2 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  11. 11.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 A 2 V battery is joined to 3 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  15. 15.🧮 Two resistors in parallel give a total that is … (a) more than either one (b) less than either one (c) their sum (d) always zero
  16. 16.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 A 47 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)?
  18. 18.🧮 A 68 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)?
  19. 19.🧮 Resistors of 22 Ω, 10 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  20. 20.🧮 A 50 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.🧮 Resistors of 22 Ω, 47 Ω, 470 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 Resistors of 33 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  25. 25.🧮 Resistors of 20 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 Resistors of 68 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 A 33 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)?
  30. 30.🧮 A 5.5 V battery is joined to 10 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  31. 31.🧮 Resistors of 22 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 A 10 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)?
  33. 33.🧮 Resistors of 20 Ω, 150 Ω, 47 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 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)?
  37. 37.🧮 A 10 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)?
  38. 38.🧮 A 100 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)?
  39. 39.🧮 An 8.5 V battery is joined to 12 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  40. 40.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. 0.5
  2. 0.5
  3. 50
  4. 53
  5. 70
  6. bigger
  7. 5
  8. 75
  9. 0.1
  10. 0.1
  11. 20
  12. 235
  13. 20
  14. 0.25
  15. less than either one
  16. 25
  17. 67
  18. 568
  19. 65
  20. 70
  21. 589
  22. 83
  23. 5
  24. 10
  25. 53
  26. 10
  27. 78
  28. 5
  29. 53
  30. 0.25
  31. 72
  32. 510
  33. 237
  34. 10
  35. 50
  36. 122
  37. 245
  38. 105
  39. 0.5
  40. 100

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