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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 214 · 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.🧮 Adding another resistor in series makes the total resistance … (a) smaller (b) zero (c) stay the same (d) bigger
  2. 2.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 Two resistors in parallel give a total that is … (a) always zero (b) less than either one (c) more than either one (d) their sum
  4. 4.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  6. 6.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 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)?
  8. 8.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 A 220 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)?
  10. 10.🧮 Resistors of 150 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 A 7 V battery is joined to 2 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  12. 12.🧮 A 1 V battery is joined to 8 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  13. 13.🧮 A 3 V battery is joined to 4 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  14. 14.🧮 A 3.5 V battery is joined to 5 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.🧮 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)?
  17. 17.🧮 A 4 V battery is joined to 3 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 A 24 V battery is joined to 12 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  19. 19.🧮 A 1.75 V battery is joined to 3 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  20. 20.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 A 470 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)?
  23. 23.🧮 A 68 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)?
  24. 24.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  25. 25.🧮 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)?
  26. 26.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 A 50 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)?
  28. 28.🧮 Resistors of 10 Ω, 22 Ω, 10 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  29. 29.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 A 0.8 V battery is joined to 5 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  31. 31.🧮 A 50 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)?
  32. 32.🧮 A 9 V battery is joined to 6 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  33. 33.🧮 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)?
  34. 34.🧮 A 10 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)?
  35. 35.🧮 Resistors of 20 Ω, 20 Ω, 470 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 Resistors of 10 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 A 2.25 V battery is joined to 5 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  39. 39.🧮 A 47 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.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. bigger
  2. 5
  3. less than either one
  4. 50
  5. 165
  6. 25
  7. 355
  8. 5
  9. 455
  10. 160
  11. 0.5
  12. 0.1
  13. 0.25
  14. 0.5
  15. 20
  16. 47
  17. 0.5
  18. 1
  19. 0.25
  20. 500
  21. 235
  22. 490
  23. 78
  24. 100
  25. 175
  26. 110
  27. 55
  28. 372
  29. 10
  30. 0.1
  31. 60
  32. 1
  33. 385
  34. 30
  35. 520
  36. 57
  37. 25
  38. 0.25
  39. 147
  40. 5

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