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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 549 · 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 100 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)?
  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 47 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  4. 4.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 Adding another resistor in series makes the total resistance … (a) stay the same (b) smaller (c) bigger (d) zero
  6. 6.🧮 A 15 V battery is joined to 10 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  7. 7.🧮 Resistors of 22 Ω, 68 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  8. 8.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 A 4.5 V battery is joined to 8 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  10. 10.🧮 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)?
  11. 11.🧮 Resistors of 50 Ω, 470 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  12. 12.🧮 Resistors of 10 Ω, 22 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  13. 13.🧮 Resistors of 33 Ω, 10 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 A 9 V battery is joined to 8 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  15. 15.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 A 4 V battery is joined to 6 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 A 100 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)?
  19. 19.🧮 A 10 V battery is joined to 5 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  20. 20.🧮 A 12 V battery is joined to 2 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  21. 21.🧮 Resistors of 22 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 A 22 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.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 Resistors of 470 Ω, 150 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 Resistors of 68 Ω, 220 Ω, 10 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 A 150 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)?
  28. 28.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 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)?
  30. 30.🧮 Resistors of 220 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 Resistors of 150 Ω, 20 Ω, 150 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 A 3.6 V battery is joined to 12 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  35. 35.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 Resistors of 10 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 A 68 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)?
  38. 38.🧮 Resistors of 330 Ω, 330 Ω, 68 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  40. 40.🧮 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)?

Answer key

  1. 125
  2. less than either one
  3. 267
  4. 25
  5. bigger
  6. 1
  7. 158
  8. 5
  9. 0.25
  10. 57
  11. 567
  12. 182
  13. 513
  14. 0.5
  15. 25
  16. 10
  17. 0.5
  18. 150
  19. 1
  20. 1
  21. 42
  22. 47
  23. 165
  24. 642
  25. 50
  26. 518
  27. 315
  28. 50
  29. 110
  30. 440
  31. 100
  32. 540
  33. 500
  34. 0.2
  35. 25
  36. 340
  37. 73
  38. 761
  39. 20
  40. 245

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