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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 55 · 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.🧮 A 0.8 V battery is joined to 5 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  2. 2.🧮 Resistors of 68 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  3. 3.🧮 A 6.5 V battery is joined to 5 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  4. 4.🧮 Adding another resistor in series makes the total resistance … (a) bigger (b) zero (c) smaller (d) stay the same
  5. 5.🧮 Resistors of 50 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  6. 6.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 A 9 V battery is joined to 3 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  8. 8.🧮 A 3.5 V battery is joined to 10 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  9. 9.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 A 13 V battery is joined to 8 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  11. 11.🧮 Resistors of 20 Ω, 50 Ω, 22 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  12. 12.🧮 A 22 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)?
  13. 13.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 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)?
  15. 15.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 A 220 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)?
  17. 17.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 Resistors of 33 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 Two resistors in parallel give a total that is … (a) their sum (b) more than either one (c) always zero (d) less than either one
  20. 20.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 A 2.5 V battery is joined to 4 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  24. 24.🧮 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)?
  25. 25.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 A 47 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)?
  27. 27.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  28. 28.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 Resistors of 22 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 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)?
  31. 31.🧮 A 20 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)?
  32. 32.🧮 Resistors of 33 Ω, 330 Ω, 47 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 A 33 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)?
  34. 34.🧮 A 7 V battery is joined to 8 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  35. 35.🧮 A 6 V battery is joined to 3 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  36. 36.🧮 Resistors of 330 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 Resistors of 47 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 A 68 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)?
  39. 39.🧮 Resistors of 10 Ω, 33 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  40. 40.🧮 A 3.5 V battery is joined to 8 Ω and 6 Ω resistors in series. What current flows (in amperes)? =

Answer key

  1. 0.1
  2. 118
  3. 0.5
  4. bigger
  5. 83
  6. 50
  7. 1
  8. 0.25
  9. 20
  10. 1
  11. 422
  12. 132
  13. 10
  14. 335
  15. 165
  16. 270
  17. 10
  18. 363
  19. less than either one
  20. 5
  21. 10
  22. 500
  23. 0.25
  24. 520
  25. 5
  26. 157
  27. 20
  28. 50
  29. 492
  30. 175
  31. 120
  32. 880
  33. 533
  34. 0.5
  35. 1
  36. 660
  37. 197
  38. 568
  39. 63
  40. 0.25

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