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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 369 · 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 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 Resistors of 22 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  4. 4.🧮 Two resistors in parallel give a total that is … (a) more than either one (b) less than either one (c) their sum (d) always zero
  5. 5.🧮 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)?
  6. 6.🧮 Resistors of 68 Ω, 470 Ω, 68 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  7. 7.🧮 A 50 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)?
  8. 8.🧮 A 17 V battery is joined to 12 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  9. 9.🧮 Resistors of 50 Ω, 50 Ω, 10 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 Resistors of 10 Ω, 100 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 Adding another resistor in series makes the total resistance … (a) bigger (b) stay the same (c) zero (d) smaller
  14. 14.🧮 A 50 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)?
  15. 15.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 A 1.3 V battery is joined to 5 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  17. 17.🧮 A 330 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)?
  18. 18.🧮 A 1.4 V battery is joined to 4 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  19. 19.🧮 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)?
  20. 20.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 A 0.7 V battery is joined to 4 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  22. 22.🧮 Resistors of 220 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 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)?
  25. 25.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 Resistors of 68 Ω, 330 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 Resistors of 470 Ω, 20 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 Resistors of 68 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  29. 29.🧮 Resistors of 150 Ω, 470 Ω, 10 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 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)?
  32. 32.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 Resistors of 22 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 Resistors of 330 Ω, 220 Ω, 50 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 A 68 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)?
  36. 36.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 Resistors of 10 Ω, 20 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 A 150 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)?
  39. 39.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  40. 40.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. 20
  2. 50
  3. 55
  4. less than either one
  5. 67
  6. 653
  7. 215
  8. 1
  9. 157
  10. 157
  11. 500
  12. 110
  13. bigger
  14. 150
  15. 100
  16. 0.1
  17. 380
  18. 0.1
  19. 265
  20. 165
  21. 0.1
  22. 270
  23. 100
  24. 43
  25. 5
  26. 408
  27. 523
  28. 288
  29. 698
  30. 25
  31. 83
  32. 10
  33. 122
  34. 668
  35. 568
  36. 20
  37. 50
  38. 200
  39. 100
  40. 235

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