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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 2 · 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 2.4 V battery is joined to 12 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  2. 2.🧮 Two resistors in parallel give a total that is … (a) less than either one (b) always zero (c) their sum (d) more than either one
  3. 3.🧮 Resistors of 47 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  4. 4.🧮 Resistors of 10 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  5. 5.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  6. 6.🧮 A 20 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)?
  7. 7.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 Adding another resistor in series makes the total resistance … (a) smaller (b) zero (c) bigger (d) stay the same
  11. 11.🧮 Resistors of 10 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  12. 12.🧮 A 1.4 V battery is joined to 10 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  13. 13.🧮 A 330 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)?
  14. 14.🧮 A 330 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)?
  15. 15.🧮 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)?
  16. 16.🧮 Resistors of 150 Ω, 330 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 A 2 V battery is joined to 2 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  19. 19.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 Resistors of 20 Ω, 100 Ω, 50 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  21. 21.🧮 Resistors of 50 Ω, 50 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 A 9 V battery is joined to 5 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  23. 23.🧮 Resistors of 68 Ω, 20 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 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)?
  25. 25.🧮 Resistors of 47 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 Resistors of 330 Ω, 47 Ω, 50 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 Resistors of 47 Ω, 220 Ω, 68 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 A 3 V battery is joined to 4 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  31. 31.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 A 10 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)?
  33. 33.🧮 Resistors of 50 Ω, 10 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 Resistors of 100 Ω, 10 Ω, 68 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 A 20 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)?
  36. 36.🧮 A 100 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)?
  37. 37.🧮 A 2.25 V battery is joined to 6 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  38. 38.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 Resistors of 470 Ω, 330 Ω, 47 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  40. 40.🧮 A 17 V battery is joined to 5 Ω and 12 Ω resistors in series. What current flows (in amperes)? =

Answer key

  1. 0.1
  2. less than either one
  3. 115
  4. 20
  5. 100
  6. 255
  7. 100
  8. 50
  9. 25
  10. bigger
  11. 78
  12. 0.1
  13. 430
  14. 830
  15. 257
  16. 500
  17. 0.2
  18. 10
  19. 20
  20. 238
  21. 120
  22. 1
  23. 138
  24. 568
  25. 67
  26. 437
  27. 385
  28. 20
  29. 5
  30. 0.5
  31. 165
  32. 175
  33. 82
  34. 188
  35. 25
  36. 110
  37. 0.25
  38. 50
  39. 867
  40. 1

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