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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 503 · 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.🧮 A 50 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)?
  2. 2.🧮 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)?
  3. 3.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  4. 4.🧮 Resistors of 68 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  5. 5.🧮 Resistors of 47 Ω, 330 Ω, 68 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  6. 6.🧮 Resistors of 22 Ω, 470 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  7. 7.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 Resistors of 10 Ω, 22 Ω, 33 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 Adding another resistor in series makes the total resistance … (a) smaller (b) bigger (c) stay the same (d) zero
  11. 11.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 A 33 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)?
  14. 14.🧮 Resistors of 10 Ω, 68 Ω, 220 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  15. 15.🧮 A 50 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)?
  16. 16.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 A 12 V battery is joined to 10 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 Resistors of 33 Ω, 68 Ω, 68 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 A 2 V battery is joined to 4 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  20. 20.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 Resistors of 33 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 Resistors of 10 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 A 330 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)?
  24. 24.🧮 A 1 V battery is joined to 8 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  25. 25.🧮 Resistors of 33 Ω, 22 Ω, 470 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 A 10 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)?
  27. 27.🧮 Resistors of 47 Ω, 100 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 A 3.5 V battery is joined to 2 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  29. 29.🧮 A 17 V battery is joined to 5 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  30. 30.🧮 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)?
  31. 31.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 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)?
  33. 33.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 Resistors of 22 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 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)?
  37. 37.🧮 Resistors of 33 Ω, 470 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 Resistors of 33 Ω, 220 Ω, 20 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 A 2 V battery is joined to 6 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  40. 40.🧮 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)?

Answer key

  1. 100
  2. 225
  3. 10
  4. 168
  5. 595
  6. 539
  7. 20
  8. 500
  9. 85
  10. bigger
  11. 50
  12. 100
  13. 43
  14. 628
  15. 550
  16. 25
  17. 1
  18. 219
  19. 0.25
  20. 20
  21. 80
  22. 30
  23. 565
  24. 0.1
  25. 593
  26. 60
  27. 215
  28. 0.25
  29. 1
  30. 60
  31. 25
  32. 355
  33. 50
  34. 44
  35. 5
  36. 175
  37. 525
  38. 306
  39. 0.2
  40. 385

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