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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 760 · 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 0.9 V battery is joined to 3 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  2. 2.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) smaller (c) bigger (d) stay the same
  4. 4.🧮 Two equal 330 Ω resistors are joined in parallel. 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 50 Ω, 20 Ω, 22 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  7. 7.🧮 A 4 V battery is joined to 6 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  8. 8.🧮 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)?
  9. 9.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 A 0.9 V battery is joined to 6 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  12. 12.🧮 Resistors of 10 Ω, 68 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  13. 13.🧮 Resistors of 470 Ω, 20 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 Two resistors in parallel give a total that is … (a) more than either one (b) less than either one (c) their sum (d) always zero
  15. 15.🧮 An 18 V battery is joined to 6 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  16. 16.🧮 A 3.25 V battery is joined to 5 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  17. 17.🧮 A 47 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)?
  18. 18.🧮 Resistors of 470 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 A 0.8 V battery is joined to 2 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  20. 20.🧮 An 8 V battery is joined to 3 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  21. 21.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 A 1.4 V battery is joined to 10 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  23. 23.🧮 Resistors of 330 Ω, 22 Ω, 22 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  25. 25.🧮 A 10 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)?
  26. 26.🧮 Resistors of 150 Ω, 50 Ω, 100 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  28. 28.🧮 A 100 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)?
  29. 29.🧮 Resistors of 330 Ω, 47 Ω, 10 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 A 7.5 V battery is joined to 12 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  31. 31.🧮 Resistors of 150 Ω, 20 Ω, 50 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 Resistors of 22 Ω, 22 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 Resistors of 470 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 Resistors of 150 Ω, 47 Ω, 20 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 A 68 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)?
  38. 38.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 An 18 V battery is joined to 8 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  40. 40.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. 0.1
  2. 100
  3. bigger
  4. 165
  5. 235
  6. 112
  7. 0.25
  8. 83
  9. 5
  10. 10
  11. 0.1
  12. 298
  13. 500
  14. less than either one
  15. 1
  16. 0.25
  17. 67
  18. 503
  19. 0.1
  20. 1
  21. 500
  22. 0.1
  23. 524
  24. 20
  25. 15
  26. 630
  27. 20
  28. 265
  29. 407
  30. 0.5
  31. 370
  32. 50
  33. 54
  34. 538
  35. 50
  36. 285
  37. 233
  38. 10
  39. 1
  40. 20

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