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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 377 · 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.🧮 Resistors of 470 Ω, 150 Ω, 20 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  2. 2.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) smaller (c) bigger (d) stay the same
  3. 3.🧮 A 0.7 V battery is joined to 5 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  4. 4.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 A 330 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)?
  6. 6.🧮 A 2.4 V battery is joined to 10 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  7. 7.🧮 Resistors of 20 Ω, 10 Ω, 33 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  8. 8.🧮 A 330 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)?
  9. 9.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 A 0.8 V battery is joined to 6 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  11. 11.🧮 A 47 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)?
  12. 12.🧮 A 22 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)?
  13. 13.🧮 Two resistors in parallel give a total that is … (a) more than either one (b) always zero (c) less than either one (d) their sum
  14. 14.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 A 47 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)?
  16. 16.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  19. 19.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 A 1 V battery is joined to 8 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  21. 21.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 Resistors of 33 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 Resistors of 150 Ω, 10 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 Resistors of 330 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 Resistors of 10 Ω, 10 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 Resistors of 50 Ω, 22 Ω, 22 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 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)?
  28. 28.🧮 An 11 V battery is joined to 5 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  29. 29.🧮 Resistors of 330 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 Resistors of 20 Ω, 330 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 A 1.2 V battery is joined to 2 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  32. 32.🧮 A 150 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)?
  33. 33.🧮 Resistors of 33 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 A 4.5 V battery is joined to 12 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  35. 35.🧮 A 0.9 V battery is joined to 5 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  36. 36.🧮 A 1.75 V battery is joined to 4 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  37. 37.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  40. 40.🧮 A 5 V battery is joined to 2 Ω and 3 Ω resistors in series. What current flows (in amperes)? =

Answer key

  1. 660
  2. bigger
  3. 0.1
  4. 5
  5. 440
  6. 0.2
  7. 533
  8. 350
  9. 10
  10. 0.1
  11. 52
  12. 522
  13. less than either one
  14. 25
  15. 67
  16. 25
  17. 50
  18. 500
  19. 5
  20. 0.1
  21. 20
  22. 101
  23. 182
  24. 363
  25. 88
  26. 104
  27. 57
  28. 1
  29. 340
  30. 397
  31. 0.2
  32. 160
  33. 55
  34. 0.25
  35. 0.1
  36. 0.25
  37. 25
  38. 20
  39. 5
  40. 1

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