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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 673 · 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 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 A 1.4 V battery is joined to 5 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  3. 3.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  4. 4.🧮 Resistors of 100 Ω, 33 Ω, 22 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  5. 5.🧮 Two resistors in parallel give a total that is … (a) their sum (b) more than either one (c) always zero (d) less than either one
  6. 6.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 Adding another resistor in series makes the total resistance … (a) bigger (b) zero (c) smaller (d) stay the same
  9. 9.🧮 A 2 V battery is joined to 6 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  10. 10.🧮 Resistors of 22 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 A 4.5 V battery is joined to 10 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  13. 13.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 Resistors of 330 Ω, 47 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 Resistors of 22 Ω, 22 Ω, 10 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  18. 18.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  19. 19.🧮 Resistors of 68 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  20. 20.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 Resistors of 470 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 A 0.7 V battery is joined to 3 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  23. 23.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 Resistors of 220 Ω, 470 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 A 2.4 V battery is joined to 2 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  26. 26.🧮 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)?
  27. 27.🧮 A 68 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)?
  28. 28.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 A 5 V battery is joined to 3 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  30. 30.🧮 A 15 V battery is joined to 10 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  31. 31.🧮 Resistors of 10 Ω, 33 Ω, 10 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 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)?
  33. 33.🧮 A 3 V battery is joined to 12 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  34. 34.🧮 A 5.5 V battery is joined to 3 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  35. 35.🧮 Resistors of 150 Ω, 50 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 An 11 V battery is joined to 6 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  37. 37.🧮 Resistors of 47 Ω, 47 Ω, 20 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 A 4 V battery is joined to 3 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  39. 39.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  40. 40.🧮 A 7 V battery is joined to 2 Ω and 5 Ω resistors in series. What current flows (in amperes)? =

Answer key

  1. 5
  2. 0.2
  3. 10
  4. 485
  5. less than either one
  6. 50
  7. 100
  8. bigger
  9. 0.2
  10. 352
  11. 50
  12. 0.25
  13. 10
  14. 10
  15. 500
  16. 399
  17. 64
  18. 20
  19. 115
  20. 50
  21. 490
  22. 0.1
  23. 5
  24. 758
  25. 0.2
  26. 30
  27. 178
  28. 20
  29. 1
  30. 1
  31. 273
  32. 155
  33. 0.2
  34. 0.5
  35. 233
  36. 1
  37. 134
  38. 0.5
  39. 110
  40. 1

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