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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 715 · 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.🧮 Adding another resistor in series makes the total resistance … (a) bigger (b) smaller (c) stay the same (d) zero
  2. 2.🧮 A 1 V battery is joined to 2 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  3. 3.🧮 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)?
  4. 4.🧮 Resistors of 50 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  5. 5.🧮 Resistors of 20 Ω, 100 Ω, 10 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  6. 6.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 Resistors of 150 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  8. 8.🧮 Resistors of 10 Ω, 33 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  9. 9.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 Resistors of 330 Ω, 47 Ω, 10 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 Resistors of 100 Ω, 10 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  12. 12.🧮 A 33 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)?
  13. 13.🧮 Resistors of 100 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 A 3.5 V battery is joined to 2 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  15. 15.🧮 A 100 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)?
  16. 16.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 Two resistors in parallel give a total that is … (a) more than either one (b) less than either one (c) always zero (d) their sum
  18. 18.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  19. 19.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 Resistors of 47 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 A 1.3 V battery is joined to 5 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  23. 23.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  25. 25.🧮 Resistors of 470 Ω, 330 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 A 0.5 V battery is joined to 3 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  27. 27.🧮 Resistors of 50 Ω, 22 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 A 3.5 V battery is joined to 2 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  29. 29.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 A 10 V battery is joined to 10 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  31. 31.🧮 Resistors of 220 Ω, 50 Ω, 470 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 Resistors of 20 Ω, 20 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 A 330 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)?
  37. 37.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 A 100 Ω resistor is joined in series with two equal 100 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  39. 39.🧮 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)?
  40. 40.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. bigger
  2. 0.2
  3. 155
  4. 83
  5. 600
  6. 500
  7. 480
  8. 513
  9. 5
  10. 537
  11. 178
  12. 533
  13. 430
  14. 0.5
  15. 335
  16. 25
  17. less than either one
  18. 165
  19. 110
  20. 5
  21. 115
  22. 0.1
  23. 10
  24. 100
  25. 1130
  26. 0.1
  27. 402
  28. 0.25
  29. 20
  30. 0.5
  31. 960
  32. 5
  33. 20
  34. 5
  35. 87
  36. 335
  37. 100
  38. 150
  39. 568
  40. 50

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