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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 278 · 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 equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  4. 4.🧮 A 7 V battery is joined to 3 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  5. 5.🧮 An 8 V battery is joined to 4 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  6. 6.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 Resistors of 47 Ω, 50 Ω, 47 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  9. 9.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) stay the same (c) smaller (d) bigger
  10. 10.🧮 Two resistors in parallel give a total that is … (a) always zero (b) less than either one (c) more than either one (d) their sum
  11. 11.🧮 A 150 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)?
  12. 12.🧮 Resistors of 10 Ω, 20 Ω, 150 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  13. 13.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 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)?
  15. 15.🧮 Resistors of 100 Ω, 50 Ω, 33 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 Resistors of 68 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 A 1.75 V battery is joined to 2 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 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)?
  19. 19.🧮 Resistors of 22 Ω, 50 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  20. 20.🧮 Resistors of 20 Ω, 20 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  21. 21.🧮 Resistors of 22 Ω, 10 Ω, 50 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 Resistors of 20 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 A 2 V battery is joined to 8 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  24. 24.🧮 A 10 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)?
  25. 25.🧮 A 1 V battery is joined to 2 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  26. 26.🧮 Resistors of 22 Ω, 220 Ω, 47 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 Resistors of 68 Ω, 47 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 Resistors of 47 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  29. 29.🧮 Resistors of 10 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 Resistors of 22 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 A 1.4 V battery is joined to 2 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  32. 32.🧮 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)?
  33. 33.🧮 Resistors of 10 Ω, 47 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 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)?
  35. 35.🧮 Resistors of 33 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 Resistors of 150 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 An 11 V battery is joined to 5 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  40. 40.🧮 A 470 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)?

Answer key

  1. 110
  2. 25
  3. 100
  4. 1
  5. 0.5
  6. 10
  7. 165
  8. 191
  9. bigger
  10. less than either one
  11. 155
  12. 213
  13. 25
  14. 30
  15. 230
  16. 288
  17. 0.25
  18. 385
  19. 542
  20. 73
  21. 104
  22. 350
  23. 0.2
  24. 110
  25. 0.25
  26. 339
  27. 135
  28. 67
  29. 60
  30. 242
  31. 0.1
  32. 650
  33. 125
  34. 125
  35. 133
  36. 20
  37. 500
  38. 200
  39. 1
  40. 520

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