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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 360 · 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.🧮 Resistors of 50 Ω, 150 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  2. 2.🧮 Two resistors in parallel give a total that is … (a) more than either one (b) always zero (c) their sum (d) less than either one
  3. 3.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  4. 4.🧮 Four equal 400 Ω resistors are joined in parallel. 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.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 A 0.5 V battery is joined to 3 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  9. 9.🧮 A 6 V battery is joined to 2 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  10. 10.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 A 22 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)?
  12. 12.🧮 A 2.2 V battery is joined to 6 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  13. 13.🧮 A 6 V battery is joined to 4 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  14. 14.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 A 10 Ω resistor is joined in series with two equal 220 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  17. 17.🧮 Adding another resistor in series makes the total resistance … (a) stay the same (b) smaller (c) zero (d) bigger
  18. 18.🧮 Resistors of 220 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 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)?
  20. 20.🧮 A 1.5 V battery is joined to 3 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  21. 21.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 A 22 V battery is joined to 12 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  23. 23.🧮 A 1.5 V battery is joined to 2 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  24. 24.🧮 Resistors of 150 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 Resistors of 33 Ω, 470 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 A 2 V battery is joined to 5 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  29. 29.🧮 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)?
  30. 30.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 Resistors of 33 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 A 4 V battery is joined to 2 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  33. 33.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 A 47 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)?
  35. 35.🧮 Resistors of 330 Ω, 22 Ω, 10 Ω and 220 Ω are joined in series. 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.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 A 330 Ω resistor is joined in series with two equal 220 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  40. 40.🧮 A 47 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. 268
  2. less than either one
  3. 100
  4. 100
  5. 50
  6. 25
  7. 100
  8. 0.1
  9. 0.5
  10. 5
  11. 122
  12. 0.2
  13. 1
  14. 50
  15. 500
  16. 120
  17. bigger
  18. 242
  19. 30
  20. 0.1
  21. 25
  22. 1
  23. 0.25
  24. 218
  25. 10
  26. 235
  27. 571
  28. 0.2
  29. 635
  30. 100
  31. 101
  32. 1
  33. 5
  34. 547
  35. 582
  36. 20
  37. 165
  38. 10
  39. 440
  40. 97

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