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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 68 · 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 resistors in parallel give a total that is … (a) their sum (b) always zero (c) more than either one (d) less than either one
  2. 2.🧮 A 33 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)?
  3. 3.🧮 Adding another resistor in series makes the total resistance … (a) stay the same (b) zero (c) bigger (d) smaller
  4. 4.🧮 Resistors of 50 Ω, 330 Ω, 220 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  5. 5.🧮 A 2.2 V battery is joined to 10 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  6. 6.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 A 3.75 V battery is joined to 12 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  8. 8.🧮 A 2 V battery is joined to 3 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  9. 9.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 A 220 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)?
  11. 11.🧮 Resistors of 68 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  12. 12.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 Resistors of 220 Ω, 22 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  15. 15.🧮 Resistors of 100 Ω, 470 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 Resistors of 20 Ω, 22 Ω, 50 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 A 47 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)?
  18. 18.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  19. 19.🧮 Resistors of 22 Ω, 47 Ω, 10 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  20. 20.🧮 Resistors of 47 Ω, 33 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  21. 21.🧮 A 33 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)?
  22. 22.🧮 A 47 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)?
  23. 23.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 A 1.8 V battery is joined to 8 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  25. 25.🧮 A 5 V battery is joined to 4 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  26. 26.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 Resistors of 22 Ω, 68 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 A 7.5 V battery is joined to 10 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  29. 29.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 Resistors of 150 Ω, 50 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 Resistors of 100 Ω, 50 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 A 1.2 V battery is joined to 8 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  34. 34.🧮 A 2.5 V battery is joined to 8 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  35. 35.🧮 A 0.8 V battery is joined to 2 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  36. 36.🧮 An 8 V battery is joined to 4 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  37. 37.🧮 A 100 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)?
  38. 38.🧮 Resistors of 330 Ω, 470 Ω, 22 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  40. 40.🧮 A 13 V battery is joined to 3 Ω and 10 Ω resistors in series. What current flows (in amperes)? =

Answer key

  1. less than either one
  2. 143
  3. bigger
  4. 700
  5. 0.1
  6. 20
  7. 0.25
  8. 0.25
  9. 20
  10. 240
  11. 101
  12. 25
  13. 10
  14. 264
  15. 592
  16. 160
  17. 282
  18. 500
  19. 409
  20. 410
  21. 198
  22. 57
  23. 5
  24. 0.1
  25. 0.5
  26. 110
  27. 112
  28. 0.5
  29. 5
  30. 420
  31. 183
  32. 165
  33. 0.1
  34. 0.25
  35. 0.1
  36. 0.5
  37. 600
  38. 922
  39. 20
  40. 1

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