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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 893 · 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 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 Adding another resistor in series makes the total resistance … (a) stay the same (b) zero (c) bigger (d) smaller
  3. 3.🧮 Two resistors in parallel give a total that is … (a) their sum (b) always zero (c) more than either one (d) less than either one
  4. 4.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 Resistors of 470 Ω, 33 Ω, 330 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  6. 6.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 Resistors of 20 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  9. 9.🧮 Resistors of 22 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 Resistors of 10 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 A 9 V battery is joined to 3 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  12. 12.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 Resistors of 50 Ω, 150 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  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.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 A 1.8 V battery is joined to 10 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  17. 17.🧮 Resistors of 100 Ω, 10 Ω, 68 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  18. 18.🧮 A 12 V battery is joined to 12 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  19. 19.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 A 1.3 V battery is joined to 5 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  21. 21.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 Resistors of 22 Ω, 10 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 A 1 V battery is joined to 8 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  25. 25.🧮 A 1.75 V battery is joined to 4 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  26. 26.🧮 A 3 V battery is joined to 12 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  27. 27.🧮 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)?
  28. 28.🧮 A 15 V battery is joined to 12 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  29. 29.🧮 A 220 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)?
  30. 30.🧮 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)?
  31. 31.🧮 Resistors of 10 Ω, 330 Ω, 47 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 Resistors of 10 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 A 33 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)?
  37. 37.🧮 Resistors of 330 Ω, 150 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 Resistors of 10 Ω, 50 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 A 150 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)?
  40. 40.🧮 Resistors of 330 Ω, 50 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. 165
  2. bigger
  3. less than either one
  4. 235
  5. 843
  6. 50
  7. 20
  8. 53
  9. 42
  10. 20
  11. 1
  12. 25
  13. 247
  14. 150
  15. 20
  16. 0.1
  17. 648
  18. 0.5
  19. 500
  20. 0.1
  21. 100
  22. 5
  23. 100
  24. 0.1
  25. 0.25
  26. 0.2
  27. 97
  28. 1
  29. 330
  30. 570
  31. 397
  32. 230
  33. 110
  34. 10
  35. 100
  36. 133
  37. 530
  38. 280
  39. 175
  40. 480

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