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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 847 · 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.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) smaller (c) bigger (d) stay the same
  2. 2.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 Two resistors in parallel give a total that is … (a) always zero (b) more than either one (c) less than either one (d) their sum
  4. 4.🧮 Resistors of 50 Ω, 22 Ω, 220 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  5. 5.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  6. 6.🧮 Resistors of 330 Ω, 100 Ω, 330 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  7. 7.🧮 A 13 V battery is joined to 5 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  8. 8.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 Resistors of 68 Ω, 10 Ω, 50 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 Resistors of 47 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 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)?
  12. 12.🧮 Resistors of 10 Ω, 33 Ω, 150 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  13. 13.🧮 A 1.8 V battery is joined to 6 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  14. 14.🧮 A 2.4 V battery is joined to 8 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  15. 15.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 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)?
  17. 17.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 A 1.6 V battery is joined to 12 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  19. 19.🧮 Resistors of 22 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  20. 20.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 A 4.4 V battery is joined to 10 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  23. 23.🧮 A 1.1 V battery is joined to 3 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  24. 24.🧮 A 20 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)?
  25. 25.🧮 A 33 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)?
  26. 26.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 An 18 V battery is joined to 8 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  28. 28.🧮 A 1.7 V battery is joined to 12 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  29. 29.🧮 Resistors of 10 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 Resistors of 10 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 Resistors of 22 Ω, 100 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 Resistors of 22 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 A 22 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)?
  35. 35.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 A 15 V battery is joined to 10 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  37. 37.🧮 A 1.6 V battery is joined to 2 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  38. 38.🧮 A 0.4 V battery is joined to 2 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  39. 39.🧮 A 0.9 V battery is joined to 4 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  40. 40.🧮 A 150 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)?

Answer key

  1. bigger
  2. 20
  3. less than either one
  4. 325
  5. 235
  6. 807
  7. 1
  8. 500
  9. 178
  10. 80
  11. 270
  12. 240
  13. 0.2
  14. 0.2
  15. 110
  16. 70
  17. 20
  18. 0.1
  19. 44
  20. 100
  21. 25
  22. 0.2
  23. 0.1
  24. 45
  25. 58
  26. 10
  27. 1
  28. 0.1
  29. 160
  30. 30
  31. 142
  32. 90
  33. 50
  34. 122
  35. 25
  36. 1
  37. 0.2
  38. 0.1
  39. 0.1
  40. 200

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