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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 24 · 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) stay the same (c) bigger (d) smaller
  2. 2.🧮 A 9 V battery is joined to 6 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  3. 3.🧮 Resistors of 68 Ω, 220 Ω, 47 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  4. 4.🧮 A 3.25 V battery is joined to 8 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  5. 5.🧮 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
  6. 6.🧮 Resistors of 33 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  7. 7.🧮 A 10 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.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 Resistors of 20 Ω, 150 Ω, 33 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 A 100 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)?
  12. 12.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 Resistors of 68 Ω, 68 Ω, 47 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 A 50 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)?
  16. 16.🧮 Resistors of 220 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 A 10 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)?
  18. 18.🧮 Resistors of 470 Ω, 10 Ω, 150 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 Resistors of 150 Ω, 50 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  21. 21.🧮 A 15 V battery is joined to 3 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  22. 22.🧮 Resistors of 50 Ω, 20 Ω and 68 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.🧮 Resistors of 220 Ω, 470 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 Resistors of 50 Ω, 68 Ω, 68 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  28. 28.🧮 Resistors of 33 Ω, 470 Ω, 330 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  29. 29.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 Resistors of 100 Ω, 470 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 A 1.6 V battery is joined to 4 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  32. 32.🧮 A 10 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)?
  33. 33.🧮 A 100 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)?
  34. 34.🧮 Resistors of 20 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 A 330 Ω resistor is joined in series with two equal 10 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  36. 36.🧮 Resistors of 22 Ω, 470 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 An 8.5 V battery is joined to 12 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  38. 38.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  40. 40.🧮 Resistors of 330 Ω, 100 Ω, 33 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. bigger
  2. 0.5
  3. 665
  4. 0.25
  5. less than either one
  6. 55
  7. 175
  8. 5
  9. 25
  10. 353
  11. 120
  12. 50
  13. 251
  14. 235
  15. 70
  16. 270
  17. 35
  18. 663
  19. 20
  20. 250
  21. 1
  22. 138
  23. 165
  24. 700
  25. 50
  26. 219
  27. 100
  28. 1163
  29. 5
  30. 580
  31. 0.1
  32. 510
  33. 150
  34. 490
  35. 335
  36. 514
  37. 0.5
  38. 5
  39. 50
  40. 531

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