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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 190 · 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) zero (b) stay the same (c) smaller (d) bigger
  2. 2.🧮 Resistors of 50 Ω, 220 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  3. 3.🧮 Resistors of 10 Ω, 470 Ω, 220 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  4. 4.🧮 Resistors of 68 Ω and 150 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) more than either one (d) always zero
  6. 6.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 A 1.8 V battery is joined to 12 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  9. 9.🧮 A 33 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)?
  10. 10.🧮 A 33 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)?
  11. 11.🧮 A 1.5 V battery is joined to 3 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  12. 12.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 A 470 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)?
  14. 14.🧮 Resistors of 470 Ω, 20 Ω, 470 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  15. 15.🧮 A 1.1 V battery is joined to 8 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  16. 16.🧮 Resistors of 100 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 Resistors of 20 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  18. 18.🧮 Resistors of 10 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 Resistors of 10 Ω, 20 Ω, 33 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  20. 20.🧮 Resistors of 68 Ω, 22 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  21. 21.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 A 47 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)?
  24. 24.🧮 A 1.5 V battery is joined to 3 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  25. 25.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 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)?
  27. 27.🧮 Resistors of 68 Ω, 33 Ω, 33 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 A 50 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)?
  29. 29.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 Resistors of 10 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 Resistors of 470 Ω, 220 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 Resistors of 68 Ω, 100 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 A 10 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.🧮 A 7 V battery is joined to 6 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  39. 39.🧮 A 2.25 V battery is joined to 6 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  40. 40.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. bigger
  2. 290
  3. 800
  4. 218
  5. less than either one
  6. 165
  7. 5
  8. 0.1
  9. 533
  10. 43
  11. 0.25
  12. 5
  13. 970
  14. 970
  15. 0.1
  16. 430
  17. 350
  18. 20
  19. 213
  20. 123
  21. 110
  22. 100
  23. 52
  24. 0.1
  25. 50
  26. 88
  27. 154
  28. 160
  29. 25
  30. 32
  31. 5
  32. 740
  33. 500
  34. 190
  35. 20
  36. 20
  37. 510
  38. 0.5
  39. 0.25
  40. 100

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