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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 90 · 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 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 A 2.4 V battery is joined to 4 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  3. 3.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  4. 4.🧮 Resistors of 33 Ω, 22 Ω, 330 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  5. 5.🧮 A 4.5 V battery is joined to 10 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  6. 6.🧮 A 1.8 V battery is joined to 8 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  7. 7.🧮 Resistors of 20 Ω, 470 Ω, 50 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  8. 8.🧮 Adding another resistor in series makes the total resistance … (a) smaller (b) stay the same (c) zero (d) bigger
  9. 9.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 A 1.2 V battery is joined to 2 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  11. 11.🧮 A 1.4 V battery is joined to 6 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  12. 12.🧮 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
  13. 13.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 A 1.4 V battery is joined to 2 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  15. 15.🧮 A 20 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)?
  16. 16.🧮 A 3 V battery is joined to 10 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  17. 17.🧮 Resistors of 100 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  18. 18.🧮 Resistors of 330 Ω, 22 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 A 10 V battery is joined to 12 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  20. 20.🧮 A 7 V battery is joined to 8 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  21. 21.🧮 A 0.7 V battery is joined to 5 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  22. 22.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 Resistors of 47 Ω, 22 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 A 4 V battery is joined to 4 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  25. 25.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 Resistors of 470 Ω, 220 Ω, 50 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  28. 28.🧮 A 4.4 V battery is joined to 10 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  29. 29.🧮 Resistors of 50 Ω, 22 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 A 14 V battery is joined to 4 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  31. 31.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 A 220 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)?
  33. 33.🧮 Two equal 20 Ω resistors are joined in parallel. 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.🧮 Resistors of 22 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 Resistors of 68 Ω, 33 Ω, 33 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 Resistors of 330 Ω, 330 Ω, 50 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 Resistors of 33 Ω, 47 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  40. 40.🧮 A 1.4 V battery is joined to 12 Ω and 2 Ω resistors in series. What current flows (in amperes)? =

Answer key

  1. 5
  2. 0.2
  3. 50
  4. 715
  5. 0.25
  6. 0.1
  7. 608
  8. bigger
  9. 100
  10. 0.2
  11. 0.1
  12. less than either one
  13. 10
  14. 0.1
  15. 520
  16. 0.25
  17. 122
  18. 385
  19. 0.5
  20. 0.5
  21. 0.1
  22. 500
  23. 219
  24. 0.5
  25. 10
  26. 762
  27. 50
  28. 0.2
  29. 292
  30. 1
  31. 5
  32. 240
  33. 10
  34. 100
  35. 32
  36. 156
  37. 50
  38. 730
  39. 127
  40. 0.1

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