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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 106 · 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 470 Ω, 20 Ω, 220 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  2. 2.🧮 Resistors of 33 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  3. 3.🧮 Two resistors in parallel give a total that is … (a) less than either one (b) always zero (c) their sum (d) more than either one
  4. 4.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 A 0.7 V battery is joined to 4 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  6. 6.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) smaller (c) bigger (d) stay the same
  7. 7.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 A 6 V battery is joined to 4 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  9. 9.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 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)?
  12. 12.🧮 A 7 V battery is joined to 3 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  13. 13.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 Resistors of 68 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  15. 15.🧮 A 6 V battery is joined to 4 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  16. 16.🧮 Resistors of 20 Ω, 10 Ω, 100 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  19. 19.🧮 Resistors of 68 Ω, 68 Ω, 330 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  20. 20.🧮 A 10 V battery is joined to 8 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  21. 21.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 Resistors of 150 Ω, 22 Ω, 150 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 A 33 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)?
  24. 24.🧮 A 9 V battery is joined to 3 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  25. 25.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 Resistors of 50 Ω, 22 Ω, 20 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 Resistors of 33 Ω, 22 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 Resistors of 33 Ω, 470 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 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)?
  31. 31.🧮 An 8 V battery is joined to 3 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  32. 32.🧮 A 2 V battery is joined to 12 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  33. 33.🧮 Resistors of 10 Ω, 10 Ω, 50 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 A 4.5 V battery is joined to 8 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  35. 35.🧮 A 47 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)?
  36. 36.🧮 Resistors of 100 Ω, 150 Ω and 20 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 330 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  38. 38.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  40. 40.🧮 A 330 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)?

Answer key

  1. 778
  2. 133
  3. less than either one
  4. 5
  5. 0.1
  6. bigger
  7. 100
  8. 0.5
  9. 110
  10. 25
  11. 385
  12. 1
  13. 10
  14. 288
  15. 1
  16. 280
  17. 165
  18. 100
  19. 486
  20. 1
  21. 25
  22. 344
  23. 58
  24. 1
  25. 10
  26. 142
  27. 275
  28. 25
  29. 525
  30. 455
  31. 1
  32. 0.1
  33. 117
  34. 0.25
  35. 147
  36. 270
  37. 265
  38. 50
  39. 5
  40. 830

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