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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 27 · 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.🧮 Resistors of 20 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  2. 2.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  4. 4.🧮 Adding another resistor in series makes the total resistance … (a) smaller (b) stay the same (c) zero (d) bigger
  5. 5.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  6. 6.🧮 Resistors of 22 Ω, 22 Ω, 68 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  7. 7.🧮 Resistors of 10 Ω, 20 Ω, 20 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  8. 8.🧮 A 3.2 V battery is joined to 8 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  9. 9.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 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
  11. 11.🧮 A 1.2 V battery is joined to 2 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  12. 12.🧮 Resistors of 150 Ω, 220 Ω, 100 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  13. 13.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 A 68 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)?
  15. 15.🧮 Resistors of 33 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 Resistors of 50 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 A 1 V battery is joined to 2 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  21. 21.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 Resistors of 100 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 Resistors of 22 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 Resistors of 10 Ω, 470 Ω, 150 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  28. 28.🧮 A 2.4 V battery is joined to 4 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  29. 29.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 A 0.8 V battery is joined to 6 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  31. 31.🧮 A 9 V battery is joined to 6 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  32. 32.🧮 Resistors of 20 Ω, 10 Ω, 470 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 Resistors of 100 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 A 68 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)?
  36. 36.🧮 Resistors of 50 Ω, 470 Ω, 50 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 Resistors of 150 Ω, 22 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  40. 40.🧮 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)?

Answer key

  1. 30
  2. 10
  3. 25
  4. bigger
  5. 5
  6. 332
  7. 72
  8. 0.2
  9. 20
  10. less than either one
  11. 0.1
  12. 800
  13. 110
  14. 118
  15. 83
  16. 5
  17. 25
  18. 520
  19. 165
  20. 0.25
  21. 50
  22. 430
  23. 90
  24. 650
  25. 10
  26. 500
  27. 50
  28. 0.2
  29. 100
  30. 0.1
  31. 0.5
  32. 970
  33. 250
  34. 20
  35. 178
  36. 620
  37. 5
  38. 235
  39. 222
  40. 455

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