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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 629 · 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.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) bigger (c) smaller (d) stay the same
  2. 2.🧮 Resistors of 470 Ω, 470 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  3. 3.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  4. 4.🧮 A 150 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.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  6. 6.🧮 Resistors of 470 Ω, 10 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  7. 7.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 Resistors of 68 Ω, 10 Ω, 10 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 Resistors of 100 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 Resistors of 10 Ω, 68 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  12. 12.🧮 Resistors of 20 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  13. 13.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 A 1.6 V battery is joined to 4 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  15. 15.🧮 A 1.25 V battery is joined to 2 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  16. 16.🧮 Resistors of 220 Ω, 47 Ω, 470 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 A 47 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)?
  19. 19.🧮 Resistors of 10 Ω, 22 Ω, 10 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  20. 20.🧮 Resistors of 470 Ω, 68 Ω, 150 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  21. 21.🧮 Resistors of 10 Ω, 22 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 Resistors of 20 Ω, 50 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 A 2.8 V battery is joined to 2 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  25. 25.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 Resistors of 330 Ω, 68 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 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
  28. 28.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 Resistors of 33 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 A 47 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.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 Resistors of 20 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 Resistors of 10 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 A 470 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)?
  36. 36.🧮 An 11 V battery is joined to 12 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  37. 37.🧮 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)?
  38. 38.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 Resistors of 100 Ω, 47 Ω, 33 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  40. 40.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. bigger
  2. 1160
  3. 100
  4. 160
  5. 50
  6. 530
  7. 5
  8. 50
  9. 156
  10. 320
  11. 100
  12. 53
  13. 10
  14. 0.2
  15. 0.25
  16. 957
  17. 10
  18. 282
  19. 512
  20. 708
  21. 65
  22. 120
  23. 165
  24. 0.2
  25. 500
  26. 418
  27. less than either one
  28. 25
  29. 133
  30. 57
  31. 20
  32. 120
  33. 30
  34. 100
  35. 705
  36. 0.5
  37. 550
  38. 5
  39. 200
  40. 25

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