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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 655 · 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 10 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  2. 2.🧮 Two resistors in parallel give a total that is … (a) always zero (b) less than either one (c) their sum (d) more than either one
  3. 3.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) stay the same (c) smaller (d) bigger
  4. 4.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  6. 6.🧮 Resistors of 470 Ω, 330 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  7. 7.🧮 A 6 V battery is joined to 2 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  8. 8.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 Resistors of 33 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 Resistors of 47 Ω, 220 Ω and 20 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 330 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  13. 13.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 A 1.8 V battery is joined to 3 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  15. 15.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 Resistors of 10 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  18. 18.🧮 Resistors of 20 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 Resistors of 33 Ω, 22 Ω, 47 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  20. 20.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 Resistors of 330 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 Resistors of 33 Ω, 470 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 Resistors of 50 Ω, 22 Ω, 220 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 A 13 V battery is joined to 3 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  26. 26.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  28. 28.🧮 Resistors of 20 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  29. 29.🧮 Resistors of 47 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 Resistors of 47 Ω, 10 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 Resistors of 330 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 Resistors of 50 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 Resistors of 47 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 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)?
  35. 35.🧮 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)?
  36. 36.🧮 A 6.5 V battery is joined to 10 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  37. 37.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 An 8.5 V battery is joined to 5 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  40. 40.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. 78
  2. less than either one
  3. bigger
  4. 10
  5. 50
  6. 1020
  7. 0.5
  8. 10
  9. 55
  10. 235
  11. 287
  12. 185
  13. 500
  14. 0.2
  15. 50
  16. 50
  17. 480
  18. 53
  19. 572
  20. 25
  21. 350
  22. 523
  23. 165
  24. 314
  25. 1
  26. 10
  27. 100
  28. 42
  29. 97
  30. 90
  31. 550
  32. 100
  33. 197
  34. 335
  35. 155
  36. 0.5
  37. 20
  38. 25
  39. 0.5
  40. 5

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