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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 418 · 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.🧮 Resistors of 20 Ω, 100 Ω, 100 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  2. 2.🧮 Adding another resistor in series makes the total resistance … (a) bigger (b) stay the same (c) smaller (d) zero
  3. 3.🧮 Resistors of 10 Ω, 68 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  4. 4.🧮 A 10 V battery is joined to 8 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  5. 5.🧮 Two resistors in parallel give a total that is … (a) more than either one (b) their sum (c) always zero (d) less than either one
  6. 6.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 Resistors of 220 Ω, 50 Ω, 20 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  9. 9.🧮 Resistors of 330 Ω, 330 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 Resistors of 470 Ω, 10 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 A 33 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)?
  12. 12.🧮 A 47 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)?
  13. 13.🧮 Resistors of 50 Ω, 47 Ω, 330 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 Resistors of 22 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  15. 15.🧮 Resistors of 50 Ω, 150 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 A 20 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.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 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)?
  19. 19.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 A 7.5 V battery is joined to 3 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  21. 21.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 A 68 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)?
  23. 23.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  25. 25.🧮 Resistors of 220 Ω, 150 Ω and 100 Ω are joined in series. 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.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  28. 28.🧮 A 9 V battery is joined to 12 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  29. 29.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 A 1.8 V battery is joined to 10 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  31. 31.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 Resistors of 50 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 Resistors of 10 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 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)?
  38. 38.🧮 Resistors of 150 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 An 11 V battery is joined to 3 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  40. 40.🧮 Resistors of 20 Ω, 150 Ω, 20 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. 240
  2. bigger
  3. 100
  4. 1
  5. less than either one
  6. 110
  7. 20
  8. 300
  9. 707
  10. 630
  11. 38
  12. 282
  13. 897
  14. 42
  15. 300
  16. 45
  17. 5
  18. 125
  19. 235
  20. 0.5
  21. 25
  22. 168
  23. 50
  24. 10
  25. 470
  26. 500
  27. 10
  28. 0.5
  29. 10
  30. 0.1
  31. 5
  32. 20
  33. 5
  34. 83
  35. 100
  36. 78
  37. 110
  38. 160
  39. 1
  40. 237

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