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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 229 · 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.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 A 2.8 V battery is joined to 4 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  4. 4.🧮 Two resistors in parallel give a total that is … (a) less than either one (b) more than either one (c) their sum (d) always zero
  5. 5.🧮 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)?
  6. 6.🧮 A 0.4 V battery is joined to 2 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  7. 7.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 A 1.1 V battery is joined to 8 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  9. 9.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 Resistors of 20 Ω, 330 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  12. 12.🧮 A 100 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)?
  13. 13.🧮 Resistors of 10 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 Resistors of 20 Ω, 22 Ω, 100 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  15. 15.🧮 Adding another resistor in series makes the total resistance … (a) bigger (b) smaller (c) stay the same (d) zero
  16. 16.🧮 Five equal 100 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 47 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, 50 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  20. 20.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 A 220 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)?
  24. 24.🧮 Resistors of 100 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 A 3.6 V battery is joined to 6 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  26. 26.🧮 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)?
  27. 27.🧮 Resistors of 20 Ω, 10 Ω, 10 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 Resistors of 10 Ω, 47 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 A 22 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)?
  34. 34.🧮 Resistors of 50 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 Resistors of 220 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 Resistors of 50 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 A 1.2 V battery is joined to 2 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  40. 40.🧮 A 15 V battery is joined to 10 Ω and 5 Ω resistors in series. What current flows (in amperes)? =

Answer key

  1. 20
  2. 5
  3. 0.2
  4. less than either one
  5. 568
  6. 0.1
  7. 5
  8. 0.1
  9. 20
  10. 5
  11. 500
  12. 200
  13. 32
  14. 612
  15. bigger
  16. 20
  17. 100
  18. 547
  19. 402
  20. 25
  21. 100
  22. 20
  23. 225
  24. 250
  25. 0.2
  26. 67
  27. 140
  28. 50
  29. 5
  30. 527
  31. 50
  32. 500
  33. 132
  34. 83
  35. 10
  36. 270
  37. 520
  38. 25
  39. 0.1
  40. 1

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