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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 40 · 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 4 V battery is joined to 6 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  2. 2.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) stay the same (c) smaller (d) bigger
  3. 3.🧮 Resistors of 150 Ω, 22 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  4. 4.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 Two resistors in parallel give a total that is … (a) less than either one (b) more than either one (c) always zero (d) their sum
  6. 6.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 A 10 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)?
  8. 8.🧮 Resistors of 47 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  9. 9.🧮 A 33 Ω resistor is joined in series with two equal 40 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  10. 10.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 A 1.8 V battery is joined to 4 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  12. 12.🧮 Resistors of 33 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  13. 13.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 A 50 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)?
  15. 15.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 Resistors of 20 Ω, 150 Ω, 47 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 Two equal 10 Ω resistors are joined in parallel. 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 47 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  20. 20.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 Resistors of 220 Ω, 22 Ω, 33 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 A 10 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)?
  23. 23.🧮 A 1.4 V battery is joined to 12 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  24. 24.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  25. 25.🧮 Resistors of 33 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 Resistors of 47 Ω, 150 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 Resistors of 68 Ω, 22 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 Resistors of 33 Ω, 68 Ω, 150 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 A 22 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)?
  31. 31.🧮 Resistors of 20 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 Resistors of 10 Ω, 220 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 A 3.4 V battery is joined to 12 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  34. 34.🧮 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)?
  35. 35.🧮 A 220 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)?
  36. 36.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 Resistors of 47 Ω, 330 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  40. 40.🧮 A 22 V battery is joined to 12 Ω and 10 Ω resistors in series. What current flows (in amperes)? =

Answer key

  1. 0.25
  2. bigger
  3. 322
  4. 50
  5. less than either one
  6. 25
  7. 20
  8. 97
  9. 53
  10. 100
  11. 0.2
  12. 503
  13. 165
  14. 160
  15. 5
  16. 367
  17. 5
  18. 20
  19. 67
  20. 25
  21. 325
  22. 175
  23. 0.1
  24. 110
  25. 101
  26. 667
  27. 100
  28. 5
  29. 271
  30. 47
  31. 53
  32. 560
  33. 0.2
  34. 30
  35. 720
  36. 50
  37. 387
  38. 20
  39. 50
  40. 1

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