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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 394 · 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 resistors in parallel give a total that is … (a) more than either one (b) less than either one (c) always zero (d) their sum
  2. 2.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 Resistors of 50 Ω, 22 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  4. 4.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 A 1.2 V battery is joined to 4 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  6. 6.🧮 Resistors of 68 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  7. 7.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 A 150 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)?
  11. 11.🧮 A 150 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.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 Adding another resistor in series makes the total resistance … (a) bigger (b) zero (c) stay the same (d) smaller
  14. 14.🧮 A 15 V battery is joined to 12 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  15. 15.🧮 A 7 V battery is joined to 8 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  16. 16.🧮 Resistors of 220 Ω, 50 Ω, 68 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 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)?
  18. 18.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  19. 19.🧮 A 150 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)?
  20. 20.🧮 A 9 V battery is joined to 4 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  21. 21.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 A 2 V battery is joined to 2 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  23. 23.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 A 150 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)?
  25. 25.🧮 Resistors of 50 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 A 1.8 V battery is joined to 5 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  27. 27.🧮 A 100 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)?
  28. 28.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 Resistors of 10 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 A 13 V battery is joined to 8 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  32. 32.🧮 A 6 V battery is joined to 6 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  33. 33.🧮 A 220 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 5 V battery is joined to 6 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  35. 35.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 Resistors of 470 Ω, 10 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 Resistors of 100 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 A 20 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)?
  39. 39.🧮 Resistors of 33 Ω, 22 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  40. 40.🧮 A 2.25 V battery is joined to 5 Ω and 4 Ω resistors in series. What current flows (in amperes)? =

Answer key

  1. less than either one
  2. 10
  3. 105
  4. 5
  5. 0.1
  6. 90
  7. 50
  8. 25
  9. 5
  10. 315
  11. 170
  12. 50
  13. bigger
  14. 1
  15. 0.5
  16. 388
  17. 150
  18. 5
  19. 650
  20. 1
  21. 100
  22. 0.5
  23. 10
  24. 155
  25. 72
  26. 0.2
  27. 600
  28. 235
  29. 20
  30. 160
  31. 1
  32. 0.5
  33. 720
  34. 0.5
  35. 50
  36. 500
  37. 133
  38. 40
  39. 385
  40. 0.25

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