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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 69 · 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.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) bigger (c) stay the same (d) smaller
  2. 2.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 A 330 Ω resistor is joined in series with two equal 470 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  4. 4.🧮 A 2 V battery is joined to 8 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  5. 5.🧮 A 0.7 V battery is joined to 3 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  6. 6.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 Two resistors in parallel give a total that is … (a) less than either one (b) more than either one (c) their sum (d) always zero
  8. 8.🧮 A 4.5 V battery is joined to 5 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  9. 9.🧮 A 68 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)?
  10. 10.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 Two equal 330 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.🧮 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)?
  14. 14.🧮 A 330 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)?
  15. 15.🧮 Resistors of 330 Ω, 20 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 Resistors of 330 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  18. 18.🧮 Resistors of 50 Ω, 20 Ω, 330 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 A 6 V battery is joined to 2 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  21. 21.🧮 A 1.4 V battery is joined to 10 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  22. 22.🧮 Resistors of 50 Ω, 47 Ω, 470 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 An 11 V battery is joined to 8 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  24. 24.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  25. 25.🧮 A 3.5 V battery is joined to 5 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  26. 26.🧮 Resistors of 20 Ω, 20 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 A 2.75 V battery is joined to 8 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  28. 28.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 A 470 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)?
  30. 30.🧮 Resistors of 10 Ω, 330 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 A 50 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)?
  33. 33.🧮 Resistors of 150 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 Resistors of 10 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 Resistors of 47 Ω, 10 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 A 7 V battery is joined to 3 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  37. 37.🧮 A 47 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)?
  38. 38.🧮 Resistors of 47 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 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)?
  40. 40.🧮 Resistors of 50 Ω, 330 Ω, 50 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. bigger
  2. 25
  3. 565
  4. 0.1
  5. 0.1
  6. 25
  7. less than either one
  8. 0.5
  9. 88
  10. 5
  11. 165
  12. 5
  13. 125
  14. 335
  15. 820
  16. 100
  17. 363
  18. 550
  19. 50
  20. 0.5
  21. 0.1
  22. 667
  23. 1
  24. 25
  25. 0.5
  26. 108
  27. 0.25
  28. 110
  29. 970
  30. 560
  31. 25
  32. 55
  33. 170
  34. 340
  35. 104
  36. 1
  37. 72
  38. 115
  39. 30
  40. 463

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