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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 48 · 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 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  4. 4.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 Resistors of 220 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  6. 6.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 Resistors of 220 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  8. 8.🧮 A 100 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)?
  9. 9.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 A 1.5 V battery is joined to 3 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  11. 11.🧮 Two resistors in parallel give a total that is … (a) their sum (b) more than either one (c) always zero (d) less than either one
  12. 12.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 Resistors of 470 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  15. 15.🧮 A 470 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)?
  16. 16.🧮 Adding another resistor in series makes the total resistance … (a) bigger (b) stay the same (c) zero (d) smaller
  17. 17.🧮 A 3.5 V battery is joined to 8 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 Resistors of 50 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 A 150 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)?
  20. 20.🧮 A 22 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)?
  21. 21.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 Resistors of 22 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 A 3.6 V battery is joined to 12 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  24. 24.🧮 Resistors of 330 Ω, 33 Ω, 22 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 A 6 V battery is joined to 2 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  26. 26.🧮 A 20 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)?
  27. 27.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  28. 28.🧮 Resistors of 33 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  29. 29.🧮 A 220 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)?
  30. 30.🧮 A 50 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.🧮 An 8.5 V battery is joined to 5 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  32. 32.🧮 Resistors of 470 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 A 3 V battery is joined to 6 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  34. 34.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 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)?
  37. 37.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 Resistors of 100 Ω, 20 Ω, 330 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 A 4 V battery is joined to 12 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  40. 40.🧮 Resistors of 330 Ω, 68 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. 50
  2. 5
  3. 50
  4. 10
  5. 288
  6. 25
  7. 270
  8. 105
  9. 10
  10. 0.25
  11. less than either one
  12. 165
  13. 235
  14. 538
  15. 580
  16. bigger
  17. 0.25
  18. 83
  19. 170
  20. 187
  21. 5
  22. 55
  23. 0.2
  24. 715
  25. 0.5
  26. 120
  27. 10
  28. 43
  29. 720
  30. 160
  31. 0.5
  32. 570
  33. 0.25
  34. 110
  35. 25
  36. 520
  37. 5
  38. 470
  39. 0.2
  40. 431

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