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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 766 · 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.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 Two resistors in parallel give a total that is … (a) always zero (b) their sum (c) less than either one (d) more than either one
  3. 3.🧮 Adding another resistor in series makes the total resistance … (a) bigger (b) zero (c) stay the same (d) smaller
  4. 4.🧮 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)?
  5. 5.🧮 Resistors of 10 Ω, 68 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  6. 6.🧮 A 2.4 V battery is joined to 12 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  7. 7.🧮 A 2.6 V battery is joined to 5 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  8. 8.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 Resistors of 22 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 Resistors of 50 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  12. 12.🧮 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)?
  13. 13.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 A 6 V battery is joined to 4 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  15. 15.🧮 Two equal 50 Ω resistors are joined in parallel. 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.🧮 A 3 V battery is joined to 3 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 A 2 V battery is joined to 12 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  19. 19.🧮 Resistors of 20 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  20. 20.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 A 50 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)?
  24. 24.🧮 A 1.4 V battery is joined to 2 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  25. 25.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 A 33 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)?
  28. 28.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 A 150 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)?
  30. 30.🧮 Resistors of 330 Ω, 10 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 Resistors of 68 Ω, 22 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 Resistors of 20 Ω, 100 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 Resistors of 22 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 A 4.5 V battery is joined to 6 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  38. 38.🧮 Resistors of 20 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 A 2.75 V battery is joined to 6 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  40. 40.🧮 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)?

Answer key

  1. 165
  2. less than either one
  3. bigger
  4. 245
  5. 408
  6. 0.1
  7. 0.2
  8. 50
  9. 25
  10. 352
  11. 72
  12. 120
  13. 25
  14. 0.5
  15. 25
  16. 25
  17. 0.5
  18. 0.1
  19. 490
  20. 5
  21. 20
  22. 10
  23. 215
  24. 0.2
  25. 50
  26. 500
  27. 43
  28. 110
  29. 160
  30. 560
  31. 20
  32. 5
  33. 560
  34. 10
  35. 188
  36. 172
  37. 0.25
  38. 170
  39. 0.25
  40. 568

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