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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 399 · 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.🧮 Adding another resistor in series makes the total resistance … (a) stay the same (b) bigger (c) smaller (d) zero
  2. 2.🧮 Resistors of 68 Ω, 220 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  3. 3.🧮 Resistors of 150 Ω, 50 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  4. 4.🧮 A 7.5 V battery is joined to 10 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  5. 5.🧮 A 9 V battery is joined to 6 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  6. 6.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 A 3.6 V battery is joined to 12 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  9. 9.🧮 Resistors of 470 Ω, 47 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 A 4 V battery is joined to 10 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  12. 12.🧮 A 330 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.🧮 A 68 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)?
  14. 14.🧮 A 4 V battery is joined to 12 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  15. 15.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 Two resistors in parallel give a total that is … (a) always zero (b) their sum (c) more than either one (d) less than either one
  19. 19.🧮 A 33 Ω resistor is joined in series with two equal 330 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  20. 20.🧮 Resistors of 150 Ω, 470 Ω, 20 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  21. 21.🧮 Resistors of 50 Ω, 470 Ω, 150 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 Resistors of 22 Ω, 33 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  25. 25.🧮 An 8 V battery is joined to 12 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  26. 26.🧮 Resistors of 220 Ω, 330 Ω, 100 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  28. 28.🧮 Resistors of 10 Ω, 68 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  29. 29.🧮 Resistors of 50 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 A 13 V battery is joined to 5 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  31. 31.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 A 20 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)?
  33. 33.🧮 A 6 V battery is joined to 8 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  34. 34.🧮 Resistors of 150 Ω, 33 Ω, 47 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 A 3 V battery is joined to 10 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  36. 36.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 Resistors of 47 Ω, 68 Ω, 330 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 A 4.25 V battery is joined to 5 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  39. 39.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  40. 40.🧮 Resistors of 20 Ω, 68 Ω, 470 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. bigger
  2. 338
  3. 420
  4. 0.5
  5. 0.5
  6. 10
  7. 10
  8. 0.2
  9. 539
  10. 110
  11. 0.25
  12. 565
  13. 73
  14. 0.25
  15. 5
  16. 20
  17. 100
  18. less than either one
  19. 198
  20. 708
  21. 820
  22. 5
  23. 102
  24. 20
  25. 0.5
  26. 683
  27. 165
  28. 228
  29. 97
  30. 1
  31. 25
  32. 120
  33. 0.5
  34. 240
  35. 0.2
  36. 10
  37. 455
  38. 0.25
  39. 25
  40. 591

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