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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 252 · 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.

NameDateTime takenScore ___ / 40
  1. 1.🧮 Two resistors in parallel give a total that is … (a) more than either one (b) always zero (c) less than either one (d) their sum
  2. 2.🧮 Adding another resistor in series makes the total resistance … (a) stay the same (b) smaller (c) zero (d) bigger
  3. 3.🧮 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)?
  4. 4.🧮 A 47 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)?
  5. 5.🧮 Resistors of 330 Ω, 20 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  6. 6.🧮 Resistors of 330 Ω, 20 Ω, 330 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  7. 7.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 A 470 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)?
  10. 10.🧮 Resistors of 20 Ω, 100 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 A 13 V battery is joined to 5 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  13. 13.🧮 A 10 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)?
  14. 14.🧮 Resistors of 100 Ω, 68 Ω, 33 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  15. 15.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 A 15 V battery is joined to 10 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  17. 17.🧮 A 0.9 V battery is joined to 4 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 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)?
  19. 19.🧮 Resistors of 100 Ω, 150 Ω, 10 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  20. 20.🧮 A 20 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)?
  21. 21.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 Resistors of 47 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 Resistors of 22 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 A 2.8 V battery is joined to 2 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  26. 26.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 A 3 V battery is joined to 2 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  28. 28.🧮 Resistors of 68 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  29. 29.🧮 A 470 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)?
  30. 30.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 A 1 V battery is joined to 6 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  33. 33.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 Resistors of 33 Ω, 22 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 A 2 V battery is joined to 2 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  36. 36.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 Resistors of 100 Ω, 50 Ω, 22 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 Resistors of 68 Ω, 68 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 A 47 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)?
  40. 40.🧮 A 470 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. less than either one
  2. bigger
  3. 225
  4. 67
  5. 500
  6. 690
  7. 10
  8. 10
  9. 480
  10. 220
  11. 25
  12. 1
  13. 15
  14. 234
  15. 235
  16. 1
  17. 0.1
  18. 133
  19. 307
  20. 45
  21. 165
  22. 50
  23. 115
  24. 69
  25. 0.2
  26. 10
  27. 0.25
  28. 218
  29. 490
  30. 5
  31. 500
  32. 0.1
  33. 20
  34. 77
  35. 0.5
  36. 20
  37. 205
  38. 158
  39. 72
  40. 635

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