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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 61 · 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.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 Resistors of 100 Ω, 50 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  4. 4.🧮 Resistors of 33 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  5. 5.🧮 Two resistors in parallel give a total that is … (a) their sum (b) less than either one (c) always zero (d) more than either one
  6. 6.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 A 68 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)?
  8. 8.🧮 A 3.4 V battery is joined to 5 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  9. 9.🧮 Three equal 75 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 330 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  11. 11.🧮 Resistors of 22 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  12. 12.🧮 A 1 V battery is joined to 6 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  13. 13.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 Resistors of 470 Ω, 22 Ω, 47 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 A 2 V battery is joined to 8 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  17. 17.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 Resistors of 33 Ω, 68 Ω, 220 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 A 3.5 V battery is joined to 3 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  21. 21.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 Adding another resistor in series makes the total resistance … (a) stay the same (b) zero (c) bigger (d) smaller
  23. 23.🧮 A 3.6 V battery is joined to 10 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  24. 24.🧮 Resistors of 47 Ω, 220 Ω, 33 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 Resistors of 20 Ω, 22 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 Resistors of 220 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  28. 28.🧮 A 4.5 V battery is joined to 4 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  29. 29.🧮 A 47 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)?
  30. 30.🧮 Resistors of 470 Ω, 100 Ω, 22 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 A 3.5 V battery is joined to 6 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  32. 32.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 Resistors of 50 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 Resistors of 10 Ω, 33 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 Resistors of 150 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 A 4.25 V battery is joined to 12 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  37. 37.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 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)?
  39. 39.🧮 A 22 Ω resistor is joined in series with two equal 200 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  40. 40.🧮 Resistors of 330 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. 100
  2. 10
  3. 200
  4. 55
  5. less than either one
  6. 100
  7. 303
  8. 0.2
  9. 25
  10. 385
  11. 44
  12. 0.1
  13. 50
  14. 100
  15. 607
  16. 0.2
  17. 20
  18. 471
  19. 25
  20. 0.5
  21. 5
  22. bigger
  23. 0.2
  24. 320
  25. 92
  26. 288
  27. 165
  28. 0.5
  29. 212
  30. 660
  31. 0.25
  32. 110
  33. 200
  34. 65
  35. 200
  36. 0.25
  37. 500
  38. 335
  39. 122
  40. 398

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