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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 107 · 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 10 Ω, 22 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  2. 2.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) smaller (c) bigger (d) stay the same
  3. 3.🧮 Resistors of 10 Ω, 20 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  4. 4.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 Two resistors in parallel give a total that is … (a) more than either one (b) less than either one (c) their sum (d) always zero
  6. 6.🧮 A 2 V battery is joined to 6 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  7. 7.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 A 68 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)?
  9. 9.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 Resistors of 220 Ω, 68 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 Resistors of 10 Ω, 20 Ω, 33 Ω and 470 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 33 Ω, 50 Ω, 220 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 A 50 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)?
  15. 15.🧮 An 11 V battery is joined to 10 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  16. 16.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 Resistors of 330 Ω, 10 Ω, 220 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 A 1.2 V battery is joined to 10 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  20. 20.🧮 Resistors of 47 Ω, 10 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  21. 21.🧮 Resistors of 150 Ω, 220 Ω and 22 Ω are joined in series. 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.🧮 A 330 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)?
  24. 24.🧮 Resistors of 33 Ω, 470 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 A 150 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)?
  26. 26.🧮 Resistors of 150 Ω, 20 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 An 8 V battery is joined to 5 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  28. 28.🧮 A 68 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)?
  29. 29.🧮 A 470 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)?
  30. 30.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 Resistors of 20 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 A 150 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)?
  34. 34.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 A 10 V battery is joined to 10 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  37. 37.🧮 Resistors of 470 Ω, 47 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 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)?
  39. 39.🧮 A 150 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)?
  40. 40.🧮 A 20 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)?

Answer key

  1. 54
  2. bigger
  3. 77
  4. 10
  5. less than either one
  6. 0.25
  7. 50
  8. 233
  9. 50
  10. 321
  11. 533
  12. 25
  13. 336
  14. 285
  15. 0.5
  16. 10
  17. 50
  18. 582
  19. 0.1
  20. 77
  21. 392
  22. 5
  23. 440
  24. 536
  25. 170
  26. 390
  27. 1
  28. 78
  29. 475
  30. 5
  31. 40
  32. 5
  33. 175
  34. 25
  35. 110
  36. 0.5
  37. 564
  38. 210
  39. 250
  40. 40

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