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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 7 · 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.

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  1. 1.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) smaller (c) bigger (d) stay the same
  2. 2.🧮 Two resistors in parallel give a total that is … (a) always zero (b) more than either one (c) less than either one (d) their sum
  3. 3.🧮 Resistors of 22 Ω, 20 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  4. 4.🧮 A 100 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)?
  5. 5.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  6. 6.🧮 A 15 V battery is joined to 12 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  7. 7.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 A 100 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)?
  10. 10.🧮 A 1.6 V battery is joined to 4 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  11. 11.🧮 Resistors of 470 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  12. 12.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 Resistors of 22 Ω, 50 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 Resistors of 220 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  15. 15.🧮 Resistors of 470 Ω, 470 Ω, 330 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 A 50 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)?
  17. 17.🧮 Resistors of 20 Ω, 100 Ω, 50 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  18. 18.🧮 Resistors of 20 Ω, 50 Ω, 220 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 Resistors of 68 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 A 2.4 V battery is joined to 4 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  26. 26.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 Resistors of 68 Ω, 47 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 Resistors of 150 Ω, 50 Ω, 68 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  29. 29.🧮 Resistors of 150 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 A 4 V battery is joined to 5 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  35. 35.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 Resistors of 150 Ω, 470 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 A 5 V battery is joined to 8 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  38. 38.🧮 A 100 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)?
  39. 39.🧮 Resistors of 22 Ω, 100 Ω, 68 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  40. 40.🧮 A 20 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)?

Answer key

  1. bigger
  2. less than either one
  3. 262
  4. 210
  5. 50
  6. 1
  7. 165
  8. 25
  9. 110
  10. 0.1
  11. 490
  12. 25
  13. 122
  14. 320
  15. 1280
  16. 215
  17. 217
  18. 300
  19. 235
  20. 110
  21. 25
  22. 50
  23. 20
  24. 101
  25. 0.2
  26. 5
  27. 137
  28. 336
  29. 370
  30. 5
  31. 100
  32. 100
  33. 5
  34. 0.5
  35. 10
  36. 1090
  37. 0.5
  38. 125
  39. 212
  40. 185

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