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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 316 · 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.🧮 A 33 Ω resistor is joined in series with two equal 100 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  2. 2.🧮 Resistors of 330 Ω, 33 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  3. 3.🧮 An 8.5 V battery is joined to 12 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  4. 4.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 A 3 V battery is joined to 3 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  6. 6.🧮 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
  7. 7.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 An 11 V battery is joined to 12 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  9. 9.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 Resistors of 10 Ω, 47 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  12. 12.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 A 68 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)?
  14. 14.🧮 A 47 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)?
  15. 15.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 A 470 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)?
  17. 17.🧮 Resistors of 150 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  18. 18.🧮 Resistors of 33 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 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)?
  21. 21.🧮 Resistors of 100 Ω, 20 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 Resistors of 470 Ω, 100 Ω, 47 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 A 3.5 V battery is joined to 3 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  24. 24.🧮 Resistors of 330 Ω, 68 Ω, 68 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 Adding another resistor in series makes the total resistance … (a) smaller (b) zero (c) stay the same (d) bigger
  26. 26.🧮 Resistors of 20 Ω, 10 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 An 8 V battery is joined to 4 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  28. 28.🧮 Resistors of 20 Ω, 220 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  29. 29.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 A 3.5 V battery is joined to 2 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  31. 31.🧮 Resistors of 220 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 Resistors of 68 Ω, 68 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 A 2.5 V battery is joined to 6 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  37. 37.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 A 10 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)?
  39. 39.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  40. 40.🧮 A 330 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)?

Answer key

  1. 83
  2. 431
  3. 0.5
  4. 10
  5. 0.5
  6. less than either one
  7. 110
  8. 0.5
  9. 500
  10. 20
  11. 387
  12. 50
  13. 93
  14. 52
  15. 10
  16. 635
  17. 170
  18. 55
  19. 5
  20. 160
  21. 270
  22. 639
  23. 0.5
  24. 499
  25. bigger
  26. 50
  27. 0.5
  28. 570
  29. 100
  30. 0.5
  31. 288
  32. 169
  33. 5
  34. 25
  35. 235
  36. 0.25
  37. 100
  38. 15
  39. 25
  40. 355

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