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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 878 · 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.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 Adding another resistor in series makes the total resistance … (a) smaller (b) zero (c) bigger (d) stay the same
  4. 4.🧮 A 6 V battery is joined to 3 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  5. 5.🧮 Two equal 20 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.🧮 A 1.25 V battery is joined to 2 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  8. 8.🧮 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)?
  9. 9.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 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)?
  11. 11.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 Resistors of 68 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  13. 13.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 A 3.5 V battery is joined to 12 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  15. 15.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 A 22 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)?
  17. 17.🧮 Resistors of 150 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  18. 18.🧮 Two resistors in parallel give a total that is … (a) always zero (b) their sum (c) less than either one (d) more than either one
  19. 19.🧮 Resistors of 22 Ω, 68 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  20. 20.🧮 A 4.5 V battery is joined to 6 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  21. 21.🧮 Resistors of 220 Ω, 10 Ω, 330 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 Resistors of 50 Ω, 100 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 Resistors of 20 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 A 10 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)?
  25. 25.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 A 13 V battery is joined to 10 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  28. 28.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 Resistors of 330 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 A 4.5 V battery is joined to 12 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  31. 31.🧮 Resistors of 330 Ω, 330 Ω, 220 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 A 3 V battery is joined to 12 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  33. 33.🧮 Resistors of 220 Ω and 68 Ω are joined in series. 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 100 Ω, 22 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 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)?
  37. 37.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 Resistors of 33 Ω, 33 Ω, 20 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 Resistors of 330 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  40. 40.🧮 A 1.6 V battery is joined to 4 Ω and 12 Ω resistors in series. What current flows (in amperes)? =

Answer key

  1. 165
  2. 100
  3. bigger
  4. 1
  5. 10
  6. 25
  7. 0.25
  8. 35
  9. 110
  10. 440
  11. 235
  12. 218
  13. 100
  14. 0.25
  15. 20
  16. 42
  17. 160
  18. less than either one
  19. 100
  20. 0.5
  21. 660
  22. 200
  23. 67
  24. 245
  25. 10
  26. 25
  27. 1
  28. 10
  29. 352
  30. 0.25
  31. 1030
  32. 0.2
  33. 288
  34. 100
  35. 342
  36. 70
  37. 10
  38. 186
  39. 550
  40. 0.1

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