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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 442 · 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.🧮 A 6.5 V battery is joined to 10 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  2. 2.🧮 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
  3. 3.🧮 Resistors of 100 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  4. 4.🧮 Adding another resistor in series makes the total resistance … (a) smaller (b) stay the same (c) zero (d) bigger
  5. 5.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  6. 6.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 Resistors of 150 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  9. 9.🧮 A 3.5 V battery is joined to 10 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  10. 10.🧮 A 22 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)?
  11. 11.🧮 Resistors of 150 Ω, 68 Ω, 20 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  12. 12.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 Resistors of 47 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  15. 15.🧮 Resistors of 150 Ω, 10 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 A 13 V battery is joined to 8 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  17. 17.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 Resistors of 22 Ω, 47 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 Resistors of 20 Ω, 10 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  21. 21.🧮 A 20 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)?
  22. 22.🧮 Three equal 300 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 220 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  24. 24.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  25. 25.🧮 An 8.5 V battery is joined to 5 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  26. 26.🧮 Resistors of 33 Ω, 33 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 Resistors of 68 Ω, 22 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 Resistors of 20 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  29. 29.🧮 Resistors of 20 Ω, 68 Ω, 68 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 A 1.5 V battery is joined to 12 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  32. 32.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 A 100 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)?
  34. 34.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 A 9 V battery is joined to 5 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  36. 36.🧮 Resistors of 220 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 A 47 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)?
  38. 38.🧮 A 16 V battery is joined to 12 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  39. 39.🧮 A 50 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)?
  40. 40.🧮 A 470 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)?

Answer key

  1. 0.5
  2. less than either one
  3. 110
  4. bigger
  5. 20
  6. 25
  7. 165
  8. 218
  9. 0.25
  10. 122
  11. 258
  12. 25
  13. 110
  14. 377
  15. 207
  16. 1
  17. 20
  18. 137
  19. 100
  20. 360
  21. 30
  22. 100
  23. 178
  24. 5
  25. 0.5
  26. 99
  27. 240
  28. 67
  29. 176
  30. 5
  31. 0.1
  32. 235
  33. 110
  34. 10
  35. 1
  36. 550
  37. 147
  38. 1
  39. 100
  40. 635

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