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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 585 · 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.🧮 Resistors of 330 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  2. 2.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 A 20 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.🧮 Adding another resistor in series makes the total resistance … (a) smaller (b) stay the same (c) bigger (d) zero
  5. 5.🧮 Resistors of 100 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  6. 6.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 A 20 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)?
  8. 8.🧮 Two resistors in parallel give a total that is … (a) less than either one (b) their sum (c) more than either one (d) always zero
  9. 9.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 Resistors of 20 Ω, 220 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 Resistors of 220 Ω, 33 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  13. 13.🧮 Resistors of 50 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 Resistors of 100 Ω, 220 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 An 8 V battery is joined to 10 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  17. 17.🧮 A 12 V battery is joined to 2 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 Resistors of 10 Ω, 330 Ω, 20 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 A 2 V battery is joined to 6 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  20. 20.🧮 Resistors of 330 Ω, 47 Ω, 470 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  21. 21.🧮 A 3.75 V battery is joined to 3 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  22. 22.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 A 1.6 V battery is joined to 5 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  25. 25.🧮 Resistors of 100 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 Resistors of 47 Ω, 33 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 A 5 V battery is joined to 12 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  28. 28.🧮 A 10 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.🧮 A 12 V battery is joined to 12 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  30. 30.🧮 Resistors of 20 Ω, 22 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 A 330 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)?
  32. 32.🧮 Resistors of 220 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 Five equal 50 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.🧮 Resistors of 10 Ω, 10 Ω, 330 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 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)?
  37. 37.🧮 A 5.5 V battery is joined to 8 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  38. 38.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 A 4.5 V battery is joined to 8 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  40. 40.🧮 Resistors of 150 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. 660
  2. 20
  3. 25
  4. bigger
  5. 250
  6. 100
  7. 40
  8. less than either one
  9. 100
  10. 262
  11. 50
  12. 473
  13. 83
  14. 10
  15. 388
  16. 0.5
  17. 1
  18. 407
  19. 0.2
  20. 1177
  21. 0.25
  22. 10
  23. 25
  24. 0.2
  25. 200
  26. 410
  27. 0.25
  28. 35
  29. 0.5
  30. 89
  31. 830
  32. 370
  33. 10
  34. 165
  35. 372
  36. 105
  37. 0.5
  38. 5
  39. 0.25
  40. 172

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