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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 41 · 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.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 Two resistors in parallel give a total that is … (a) their sum (b) less than either one (c) always zero (d) more than either one
  4. 4.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) stay the same (c) smaller (d) bigger
  5. 5.🧮 Resistors of 50 Ω, 33 Ω, 50 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  6. 6.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 A 470 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.🧮 A 1.6 V battery is joined to 4 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  10. 10.🧮 Four equal 20 Ω resistors are joined in parallel. 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 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 Resistors of 33 Ω, 10 Ω, 10 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 A 4.5 V battery is joined to 8 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  15. 15.🧮 A 20 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)?
  16. 16.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 Resistors of 47 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  18. 18.🧮 A 7 V battery is joined to 2 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  19. 19.🧮 Three equal 150 Ω resistors are joined in parallel. 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 68 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)?
  22. 22.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 A 220 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)?
  24. 24.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  25. 25.🧮 A 2.4 V battery is joined to 2 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  26. 26.🧮 A 22 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)?
  27. 27.🧮 Resistors of 50 Ω, 220 Ω, 20 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 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)?
  29. 29.🧮 A 12 V battery is joined to 6 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  30. 30.🧮 Resistors of 33 Ω, 22 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 Resistors of 100 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 A 220 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)?
  34. 34.🧮 A 150 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)?
  35. 35.🧮 Resistors of 150 Ω, 470 Ω, 33 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 Resistors of 20 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 Resistors of 50 Ω, 220 Ω, 150 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 A 68 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)?
  40. 40.🧮 Resistors of 470 Ω, 220 Ω, 10 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. 25
  2. 5
  3. less than either one
  4. bigger
  5. 143
  6. 25
  7. 100
  8. 570
  9. 0.2
  10. 5
  11. 500
  12. 10
  13. 203
  14. 0.25
  15. 185
  16. 25
  17. 517
  18. 0.5
  19. 50
  20. 165
  21. 93
  22. 20
  23. 320
  24. 10
  25. 0.2
  26. 42
  27. 300
  28. 110
  29. 1
  30. 77
  31. 10
  32. 430
  33. 455
  34. 250
  35. 675
  36. 120
  37. 100
  38. 750
  39. 88
  40. 722

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