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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 395 · 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) always zero (b) less than either one (c) their sum (d) more than either one
  2. 2.🧮 Resistors of 50 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  3. 3.🧮 A 1.2 V battery is joined to 3 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  4. 4.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 A 1.6 V battery is joined to 8 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  6. 6.🧮 Adding another resistor in series makes the total resistance … (a) stay the same (b) smaller (c) bigger (d) zero
  7. 7.🧮 A 2.75 V battery is joined to 6 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  8. 8.🧮 A 6.5 V battery is joined to 5 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  9. 9.🧮 Resistors of 22 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 A 22 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)?
  11. 11.🧮 Resistors of 20 Ω, 150 Ω, 470 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  12. 12.🧮 Two equal 330 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 40 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  14. 14.🧮 A 1.25 V battery is joined to 3 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  15. 15.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 Resistors of 33 Ω, 33 Ω, 470 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 Resistors of 220 Ω, 100 Ω, 20 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  18. 18.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  19. 19.🧮 A 3 V battery is joined to 3 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  20. 20.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 A 0.7 V battery is joined to 4 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  22. 22.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 Resistors of 68 Ω, 33 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  25. 25.🧮 Resistors of 220 Ω, 47 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 A 3.5 V battery is joined to 4 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  27. 27.🧮 A 68 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)?
  28. 28.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 A 22 V battery is joined to 10 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  30. 30.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 A 0.8 V battery is joined to 2 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  32. 32.🧮 A 3.4 V battery is joined to 5 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  33. 33.🧮 A 4.5 V battery is joined to 5 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  34. 34.🧮 A 3.2 V battery is joined to 4 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  35. 35.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  40. 40.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. less than either one
  2. 118
  3. 0.2
  4. 20
  5. 0.1
  6. bigger
  7. 0.25
  8. 0.5
  9. 44
  10. 72
  11. 708
  12. 165
  13. 88
  14. 0.25
  15. 20
  16. 546
  17. 560
  18. 25
  19. 0.2
  20. 5
  21. 0.1
  22. 50
  23. 111
  24. 10
  25. 277
  26. 0.25
  27. 233
  28. 10
  29. 1
  30. 100
  31. 0.2
  32. 0.2
  33. 0.5
  34. 0.2
  35. 500
  36. 50
  37. 20
  38. 5
  39. 25
  40. 10

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