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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 728 · 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 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)?
  2. 2.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 Resistors of 33 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  4. 4.🧮 Two resistors in parallel give a total that is … (a) less than either one (b) always zero (c) their sum (d) more than either one
  5. 5.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  6. 6.🧮 A 220 Ω resistor is joined in series with two equal 50 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  7. 7.🧮 A 7.5 V battery is joined to 10 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  8. 8.🧮 A 0.7 V battery is joined to 2 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  9. 9.🧮 A 22 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)?
  10. 10.🧮 Resistors of 10 Ω, 33 Ω, 33 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 A 1.2 V battery is joined to 2 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  12. 12.🧮 A 0.8 V battery is joined to 2 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  13. 13.🧮 Adding another resistor in series makes the total resistance … (a) smaller (b) bigger (c) stay the same (d) zero
  14. 14.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 Resistors of 22 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 Resistors of 68 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 Resistors of 100 Ω, 10 Ω, 50 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  18. 18.🧮 A 2.6 V battery is joined to 10 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  19. 19.🧮 A 33 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)?
  20. 20.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 A 330 Ω resistor is joined in series with two equal 50 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  23. 23.🧮 A 150 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.🧮 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)?
  25. 25.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 Resistors of 470 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 Resistors of 330 Ω, 150 Ω, 50 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 A 0.8 V battery is joined to 2 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  29. 29.🧮 A 2.25 V battery is joined to 4 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  30. 30.🧮 A 3.4 V battery is joined to 12 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  31. 31.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 A 3.5 V battery is joined to 10 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  34. 34.🧮 Resistors of 33 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 A 3.4 V battery is joined to 5 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  36. 36.🧮 A 3 V battery is joined to 2 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  37. 37.🧮 Resistors of 150 Ω, 150 Ω, 22 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 Resistors of 10 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 Resistors of 150 Ω, 50 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  40. 40.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. 83
  2. 50
  3. 66
  4. less than either one
  5. 20
  6. 245
  7. 0.5
  8. 0.1
  9. 132
  10. 296
  11. 0.2
  12. 0.1
  13. bigger
  14. 5
  15. 352
  16. 538
  17. 260
  18. 0.2
  19. 38
  20. 235
  21. 110
  22. 355
  23. 260
  24. 30
  25. 25
  26. 520
  27. 1000
  28. 0.2
  29. 0.25
  30. 0.2
  31. 10
  32. 10
  33. 0.25
  34. 133
  35. 0.2
  36. 0.25
  37. 792
  38. 60
  39. 670
  40. 20

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