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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 277 · 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 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 An 11 V battery is joined to 8 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  3. 3.🧮 A 3.5 V battery is joined to 5 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  4. 4.🧮 Adding another resistor in series makes the total resistance … (a) stay the same (b) smaller (c) zero (d) bigger
  5. 5.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  6. 6.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 A 33 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)?
  8. 8.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 A 2.2 V battery is joined to 8 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  10. 10.🧮 A 0.7 V battery is joined to 2 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  11. 11.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 Resistors of 10 Ω, 68 Ω and 10 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.🧮 Resistors of 22 Ω, 68 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  15. 15.🧮 Two resistors in parallel give a total that is … (a) more than either one (b) their sum (c) always zero (d) less than either one
  16. 16.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  19. 19.🧮 A 2.8 V battery is joined to 8 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  20. 20.🧮 Resistors of 150 Ω, 220 Ω, 10 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  21. 21.🧮 A 4.5 V battery is joined to 6 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  22. 22.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 A 1.7 V battery is joined to 12 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  24. 24.🧮 A 0.8 V battery is joined to 5 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  25. 25.🧮 A 10 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)?
  26. 26.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 A 470 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)?
  28. 28.🧮 Resistors of 68 Ω, 47 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  29. 29.🧮 A 1.2 V battery is joined to 10 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  30. 30.🧮 A 68 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)?
  31. 31.🧮 Resistors of 10 Ω, 220 Ω, 10 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 Resistors of 470 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 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)?
  36. 36.🧮 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)?
  37. 37.🧮 A 2.5 V battery is joined to 5 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  38. 38.🧮 Resistors of 20 Ω, 68 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 Resistors of 22 Ω, 47 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  40. 40.🧮 Resistors of 330 Ω, 33 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. 10
  2. 1
  3. 0.5
  4. bigger
  5. 10
  6. 20
  7. 83
  8. 25
  9. 0.2
  10. 0.1
  11. 50
  12. 88
  13. 100
  14. 123
  15. less than either one
  16. 235
  17. 20
  18. 165
  19. 0.2
  20. 402
  21. 0.5
  22. 5
  23. 0.1
  24. 0.1
  25. 120
  26. 5
  27. 520
  28. 125
  29. 0.1
  30. 178
  31. 260
  32. 20
  33. 690
  34. 20
  35. 200
  36. 270
  37. 0.25
  38. 121
  39. 91
  40. 410

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