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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 37 · 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 0.7 V battery is joined to 4 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  2. 2.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 A 33 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)?
  4. 4.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 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
  6. 6.🧮 An 11 V battery is joined to 12 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  7. 7.🧮 A 150 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)?
  8. 8.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 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)?
  10. 10.🧮 Resistors of 10 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 Five equal 250 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.🧮 Resistors of 33 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 Resistors of 47 Ω, 47 Ω, 33 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 Resistors of 100 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 Resistors of 20 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 Resistors of 10 Ω, 47 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  21. 21.🧮 A 1.8 V battery is joined to 6 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  22. 22.🧮 Resistors of 68 Ω, 150 Ω, 47 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 Resistors of 47 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 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)?
  25. 25.🧮 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)?
  26. 26.🧮 Resistors of 150 Ω, 220 Ω, 20 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 Adding another resistor in series makes the total resistance … (a) stay the same (b) bigger (c) smaller (d) zero
  28. 28.🧮 Resistors of 22 Ω, 68 Ω, 10 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  29. 29.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 A 1.5 V battery is joined to 12 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  31. 31.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 A 220 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)?
  34. 34.🧮 Resistors of 22 Ω, 50 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 A 9 V battery is joined to 8 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  36. 36.🧮 A 33 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)?
  37. 37.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 Resistors of 470 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  40. 40.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. 0.1
  2. 110
  3. 133
  4. 10
  5. less than either one
  6. 0.5
  7. 200
  8. 50
  9. 73
  10. 78
  11. 50
  12. 5
  13. 53
  14. 25
  15. 147
  16. 250
  17. 165
  18. 30
  19. 10
  20. 77
  21. 0.2
  22. 595
  23. 80
  24. 110
  25. 970
  26. 423
  27. bigger
  28. 147
  29. 100
  30. 0.1
  31. 20
  32. 10
  33. 320
  34. 105
  35. 0.5
  36. 58
  37. 25
  38. 10
  39. 492
  40. 50

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