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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 114 · 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.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 A 1.5 V battery is joined to 3 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  3. 3.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  4. 4.🧮 A 5 V battery is joined to 8 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  5. 5.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) stay the same (c) smaller (d) bigger
  6. 6.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 A 100 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)?
  10. 10.🧮 Two resistors in parallel give a total that is … (a) always zero (b) less than either one (c) their sum (d) more than either one
  11. 11.🧮 A 220 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)?
  12. 12.🧮 A 150 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)?
  13. 13.🧮 Resistors of 47 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 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)?
  15. 15.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 Resistors of 100 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 A 10 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.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  19. 19.🧮 A 20 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)?
  20. 20.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 Resistors of 20 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 A 3.5 V battery is joined to 2 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  24. 24.🧮 Resistors of 20 Ω, 470 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 A 4.5 V battery is joined to 3 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  27. 27.🧮 Resistors of 20 Ω, 330 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 A 100 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)?
  29. 29.🧮 Resistors of 10 Ω, 100 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 A 20 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)?
  32. 32.🧮 Resistors of 330 Ω, 330 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 Resistors of 20 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 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)?
  36. 36.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 Resistors of 50 Ω, 50 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 Resistors of 22 Ω, 330 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 A 1.1 V battery is joined to 6 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. 100
  2. 0.1
  3. 100
  4. 0.5
  5. bigger
  6. 500
  7. 50
  8. 50
  9. 120
  10. less than either one
  11. 230
  12. 385
  13. 97
  14. 105
  15. 10
  16. 110
  17. 30
  18. 5
  19. 520
  20. 10
  21. 53
  22. 20
  23. 0.25
  24. 590
  25. 165
  26. 0.5
  27. 450
  28. 125
  29. 210
  30. 25
  31. 30
  32. 728
  33. 70
  34. 10
  35. 245
  36. 5
  37. 120
  38. 385
  39. 0.1
  40. 100

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