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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 401 · 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) smaller (b) zero (c) bigger (d) stay the same
  2. 2.🧮 A 6 V battery is joined to 4 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  3. 3.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  4. 4.🧮 Resistors of 33 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  5. 5.🧮 A 470 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)?
  6. 6.🧮 A 10 V battery is joined to 4 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  7. 7.🧮 Two resistors in parallel give a total that is … (a) less than either one (b) always zero (c) more than either one (d) their sum
  8. 8.🧮 Resistors of 100 Ω, 33 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  9. 9.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 A 330 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 33 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)?
  13. 13.🧮 A 0.7 V battery is joined to 4 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  14. 14.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 A 1.75 V battery is joined to 4 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  17. 17.🧮 A 220 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)?
  18. 18.🧮 A 330 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.🧮 A 0.8 V battery is joined to 4 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  20. 20.🧮 A 50 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)?
  21. 21.🧮 A 150 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)?
  22. 22.🧮 A 1.3 V battery is joined to 3 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  23. 23.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 Resistors of 47 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 Resistors of 68 Ω, 220 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.🧮 A 24 V battery is joined to 12 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  28. 28.🧮 A 47 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)?
  29. 29.🧮 Resistors of 68 Ω, 150 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 Resistors of 68 Ω, 22 Ω, 220 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 Resistors of 20 Ω, 470 Ω, 220 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 Resistors of 470 Ω, 22 Ω, 22 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 Resistors of 47 Ω, 470 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 A 1.6 V battery is joined to 6 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  36. 36.🧮 Resistors of 100 Ω, 20 Ω, 47 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  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.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  40. 40.🧮 Resistors of 33 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. bigger
  2. 1
  3. 20
  4. 80
  5. 580
  6. 1
  7. less than either one
  8. 183
  9. 25
  10. 10
  11. 495
  12. 83
  13. 0.1
  14. 165
  15. 5
  16. 0.25
  17. 225
  18. 355
  19. 0.1
  20. 60
  21. 650
  22. 0.1
  23. 110
  24. 67
  25. 388
  26. 500
  27. 1
  28. 212
  29. 265
  30. 410
  31. 730
  32. 664
  33. 50
  34. 617
  35. 0.2
  36. 497
  37. 50
  38. 125
  39. 5
  40. 183

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