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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 147 · 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.

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  1. 1.🧮 Resistors of 220 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  2. 2.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 A 16 V battery is joined to 12 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  4. 4.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 A 1.75 V battery is joined to 5 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  6. 6.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 Adding another resistor in series makes the total resistance … (a) stay the same (b) smaller (c) bigger (d) zero
  9. 9.🧮 Resistors of 470 Ω, 470 Ω, 470 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 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)?
  11. 11.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 Resistors of 33 Ω, 68 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  15. 15.🧮 A 4.25 V battery is joined to 5 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  16. 16.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 A 4.5 V battery is joined to 6 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  19. 19.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 An 8 V battery is joined to 2 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  21. 21.🧮 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)?
  22. 22.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 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)?
  24. 24.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  25. 25.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 A 68 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)?
  27. 27.🧮 A 1.4 V battery is joined to 12 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  28. 28.🧮 Resistors of 68 Ω, 470 Ω, 10 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  29. 29.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 A 2.75 V battery is joined to 5 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  32. 32.🧮 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
  33. 33.🧮 An 11 V battery is joined to 3 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  34. 34.🧮 Resistors of 100 Ω, 10 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 A 47 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)?
  36. 36.🧮 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)?
  37. 37.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 Resistors of 220 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 A 33 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.🧮 A 5 V battery is joined to 5 Ω and 5 Ω resistors in series. What current flows (in amperes)? =

Answer key

  1. 242
  2. 100
  3. 1
  4. 100
  5. 0.25
  6. 5
  7. 5
  8. bigger
  9. 1420
  10. 83
  11. 500
  12. 5
  13. 100
  14. 121
  15. 0.25
  16. 25
  17. 0.25
  18. 110
  19. 50
  20. 1
  21. 170
  22. 20
  23. 568
  24. 10
  25. 20
  26. 118
  27. 0.1
  28. 570
  29. 20
  30. 165
  31. 0.25
  32. less than either one
  33. 1
  34. 580
  35. 212
  36. 105
  37. 5
  38. 230
  39. 198
  40. 0.5

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