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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 892 · 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 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 Resistors of 68 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  3. 3.🧮 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)?
  4. 4.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  6. 6.🧮 A 9 V battery is joined to 12 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  7. 7.🧮 A 3.5 V battery is joined to 6 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  8. 8.🧮 A 3.2 V battery is joined to 8 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  9. 9.🧮 Resistors of 470 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 Resistors of 150 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 Resistors of 220 Ω, 100 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  12. 12.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 Resistors of 150 Ω, 470 Ω, 20 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 A 2.6 V battery is joined to 5 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  15. 15.🧮 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)?
  16. 16.🧮 A 1.7 V battery is joined to 5 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  17. 17.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 Resistors of 68 Ω, 100 Ω, 100 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 Resistors of 330 Ω, 10 Ω, 33 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  20. 20.🧮 A 1.5 V battery is joined to 10 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  21. 21.🧮 Resistors of 68 Ω, 22 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 Resistors of 470 Ω, 100 Ω, 100 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 A 1.5 V battery is joined to 2 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  25. 25.🧮 Resistors of 20 Ω, 22 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 Resistors of 100 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 Resistors of 20 Ω, 20 Ω, 10 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 A 0.5 V battery is joined to 2 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  29. 29.🧮 A 1.5 V battery is joined to 3 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  30. 30.🧮 An 11 V battery is joined to 3 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  31. 31.🧮 Two resistors in parallel give a total that is … (a) always zero (b) less than either one (c) their sum (d) more than either one
  32. 32.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 A 68 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)?
  35. 35.🧮 Resistors of 330 Ω, 22 Ω, 20 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 A 47 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)?
  37. 37.🧮 A 3 V battery is joined to 2 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  38. 38.🧮 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)?
  39. 39.🧮 Resistors of 68 Ω, 20 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  40. 40.🧮 Resistors of 22 Ω, 150 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. 5
  2. 118
  3. 200
  4. 500
  5. 20
  6. 0.5
  7. 0.25
  8. 0.2
  9. 690
  10. 250
  11. 650
  12. 5
  13. 687
  14. 0.2
  15. 105
  16. 0.1
  17. 100
  18. 288
  19. 406
  20. 0.1
  21. 112
  22. 20
  23. 690
  24. 0.25
  25. 262
  26. 250
  27. 72
  28. 0.1
  29. 0.25
  30. 1
  31. less than either one
  32. 25
  33. 25
  34. 568
  35. 405
  36. 57
  37. 0.5
  38. 520
  39. 138
  40. 192

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