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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 244 · 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) stay the same (b) bigger (c) zero (d) smaller
  2. 2.🧮 Resistors of 100 Ω, 10 Ω, 100 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  3. 3.🧮 A 470 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)?
  4. 4.🧮 Resistors of 33 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  5. 5.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  6. 6.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 Resistors of 470 Ω, 68 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  9. 9.🧮 A 1 V battery is joined to 2 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  10. 10.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 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)?
  12. 12.🧮 Resistors of 22 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  13. 13.🧮 Resistors of 50 Ω, 100 Ω, 100 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 Resistors of 22 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  15. 15.🧮 Resistors of 220 Ω, 47 Ω, 100 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 Resistors of 33 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  19. 19.🧮 Resistors of 10 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  20. 20.🧮 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
  21. 21.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  25. 25.🧮 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)?
  26. 26.🧮 Resistors of 330 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 A 6 V battery is joined to 6 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  28. 28.🧮 A 2.4 V battery is joined to 6 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  29. 29.🧮 Resistors of 50 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 Resistors of 100 Ω, 20 Ω, 470 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 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)?
  33. 33.🧮 Resistors of 68 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 A 0.8 V battery is joined to 2 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  35. 35.🧮 A 4 V battery is joined to 6 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  36. 36.🧮 Resistors of 470 Ω, 33 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 Resistors of 33 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 A 20 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)?
  39. 39.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  40. 40.🧮 A 220 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)?

Answer key

  1. bigger
  2. 230
  3. 705
  4. 83
  5. 5
  6. 5
  7. 50
  8. 560
  9. 0.1
  10. 25
  11. 185
  12. 90
  13. 300
  14. 72
  15. 377
  16. 101
  17. 10
  18. 10
  19. 480
  20. less than either one
  21. 20
  22. 5
  23. 25
  24. 10
  25. 110
  26. 340
  27. 0.5
  28. 0.2
  29. 83
  30. 600
  31. 165
  32. 385
  33. 78
  34. 0.2
  35. 0.5
  36. 833
  37. 55
  38. 70
  39. 20
  40. 270

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