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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 642 · 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.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 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)?
  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) stay the same (b) smaller (c) bigger (d) zero
  5. 5.🧮 Resistors of 50 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  6. 6.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 Resistors of 50 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  8. 8.🧮 A 1.25 V battery is joined to 2 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  9. 9.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 A 33 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)?
  13. 13.🧮 A 10 V battery is joined to 6 Ω and 4 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 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 A 1.3 V battery is joined to 3 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  17. 17.🧮 Resistors of 68 Ω, 22 Ω, 100 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  18. 18.🧮 Two equal 50 Ω resistors are joined in parallel. 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 33 Ω, 20 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  21. 21.🧮 A 3.5 V battery is joined to 2 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  22. 22.🧮 A 20 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)?
  23. 23.🧮 A 6 V battery is joined to 3 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  24. 24.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  25. 25.🧮 A 4.5 V battery is joined to 10 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  26. 26.🧮 A 2 V battery is joined to 12 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  27. 27.🧮 A 0.5 V battery is joined to 3 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  28. 28.🧮 A 24 V battery is joined to 12 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  29. 29.🧮 A 470 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)?
  30. 30.🧮 Resistors of 20 Ω, 50 Ω, 22 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 Resistors of 100 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 Resistors of 220 Ω, 10 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 Resistors of 100 Ω, 220 Ω, 150 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 Resistors of 22 Ω, 150 Ω, 330 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 Resistors of 150 Ω, 47 Ω, 68 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 A 22 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)?
  39. 39.🧮 A 14 V battery is joined to 6 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  40. 40.🧮 A 0.9 V battery is joined to 5 Ω and 4 Ω resistors in series. What current flows (in amperes)? =

Answer key

  1. 20
  2. 120
  3. less than either one
  4. bigger
  5. 70
  6. 235
  7. 150
  8. 0.25
  9. 20
  10. 5
  11. 10
  12. 43
  13. 1
  14. 50
  15. 10
  16. 0.1
  17. 340
  18. 25
  19. 20
  20. 86
  21. 0.25
  22. 70
  23. 1
  24. 100
  25. 0.25
  26. 0.1
  27. 0.1
  28. 1
  29. 705
  30. 312
  31. 320
  32. 25
  33. 380
  34. 520
  35. 524
  36. 165
  37. 285
  38. 257
  39. 1
  40. 0.1

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