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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 478 · 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.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 A 22 V battery is joined to 12 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  3. 3.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  4. 4.🧮 Two resistors in parallel give a total that is … (a) always zero (b) their sum (c) less than either one (d) more than either one
  5. 5.🧮 A 14 V battery is joined to 8 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  6. 6.🧮 Resistors of 33 Ω, 22 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  7. 7.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 Resistors of 150 Ω, 10 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  9. 9.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 A 20 V battery is joined to 8 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  11. 11.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 An 8 V battery is joined to 6 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  13. 13.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 A 220 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)?
  15. 15.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 Resistors of 150 Ω, 33 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 A 1 V battery is joined to 8 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 Adding another resistor in series makes the total resistance … (a) stay the same (b) zero (c) bigger (d) smaller
  19. 19.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 A 330 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)?
  21. 21.🧮 Resistors of 10 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 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)?
  23. 23.🧮 Resistors of 220 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 A 16 V battery is joined to 6 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  25. 25.🧮 Resistors of 220 Ω, 47 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  28. 28.🧮 Resistors of 22 Ω, 47 Ω, 20 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  29. 29.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 Resistors of 47 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 An 11 V battery is joined to 6 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  32. 32.🧮 A 0.4 V battery is joined to 2 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  33. 33.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 A 2.25 V battery is joined to 3 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  36. 36.🧮 Resistors of 100 Ω, 220 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 A 6 V battery is joined to 3 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  38. 38.🧮 A 1.25 V battery is joined to 3 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  39. 39.🧮 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)?
  40. 40.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. 25
  2. 1
  3. 10
  4. less than either one
  5. 1
  6. 102
  7. 100
  8. 182
  9. 100
  10. 1
  11. 10
  12. 1
  13. 10
  14. 320
  15. 165
  16. 193
  17. 0.1
  18. bigger
  19. 50
  20. 340
  21. 110
  22. 40
  23. 267
  24. 1
  25. 417
  26. 50
  27. 110
  28. 111
  29. 235
  30. 94
  31. 1
  32. 0.1
  33. 5
  34. 500
  35. 0.25
  36. 790
  37. 1
  38. 0.25
  39. 233
  40. 25

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