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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 742 · 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 0.8 V battery is joined to 6 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  2. 2.🧮 A 20 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)?
  3. 3.🧮 Two resistors in parallel give a total that is … (a) more than either one (b) their sum (c) less than either one (d) always zero
  4. 4.🧮 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)?
  5. 5.🧮 Resistors of 20 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  6. 6.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 Resistors of 220 Ω, 10 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  8. 8.🧮 A 33 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)?
  9. 9.🧮 Resistors of 33 Ω, 10 Ω, 150 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 An 8 V battery is joined to 10 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  11. 11.🧮 Resistors of 330 Ω, 22 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  12. 12.🧮 A 22 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)?
  13. 13.🧮 Resistors of 68 Ω, 20 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 Adding another resistor in series makes the total resistance … (a) smaller (b) zero (c) stay the same (d) bigger
  16. 16.🧮 A 9 V battery is joined to 3 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  17. 17.🧮 Two equal 10 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 330 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  19. 19.🧮 Resistors of 68 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  20. 20.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 A 33 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)?
  22. 22.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 Resistors of 220 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 An 8 V battery is joined to 8 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  25. 25.🧮 Resistors of 50 Ω, 220 Ω, 220 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  28. 28.🧮 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)?
  29. 29.🧮 A 470 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)?
  30. 30.🧮 A 33 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)?
  31. 31.🧮 Resistors of 22 Ω, 22 Ω, 47 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 A 1.6 V battery is joined to 4 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  33. 33.🧮 A 330 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)?
  34. 34.🧮 Resistors of 68 Ω, 470 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.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 Resistors of 33 Ω, 50 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 Resistors of 47 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  40. 40.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. 0.1
  2. 30
  3. less than either one
  4. 110
  5. 40
  6. 5
  7. 250
  8. 133
  9. 413
  10. 0.5
  11. 402
  12. 122
  13. 418
  14. 100
  15. bigger
  16. 1
  17. 5
  18. 265
  19. 136
  20. 50
  21. 53
  22. 110
  23. 440
  24. 0.5
  25. 820
  26. 5
  27. 25
  28. 60
  29. 495
  30. 198
  31. 421
  32. 0.2
  33. 340
  34. 560
  35. 5
  36. 50
  37. 183
  38. 80
  39. 235
  40. 50

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