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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 130 · 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 15 V battery is joined to 10 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  2. 2.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) smaller (c) stay the same (d) bigger
  3. 3.🧮 Four equal 100 Ω resistors are joined in parallel. 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 equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  6. 6.🧮 A 1.7 V battery is joined to 5 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  7. 7.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 A 1.6 V battery is joined to 4 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  12. 12.🧮 Two resistors in parallel give a total that is … (a) always zero (b) less than either one (c) more than either one (d) their sum
  13. 13.🧮 Resistors of 470 Ω, 10 Ω, 47 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 Resistors of 150 Ω, 20 Ω, 10 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  15. 15.🧮 A 9 V battery is joined to 8 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  16. 16.🧮 Resistors of 20 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 Resistors of 22 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 A 22 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)?
  20. 20.🧮 A 470 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)?
  21. 21.🧮 A 1.6 V battery is joined to 6 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  22. 22.🧮 A 2.4 V battery is joined to 6 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  23. 23.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  25. 25.🧮 A 50 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)?
  26. 26.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 A 0.8 V battery is joined to 6 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  28. 28.🧮 A 3 V battery is joined to 2 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  29. 29.🧮 An 11 V battery is joined to 12 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  30. 30.🧮 A 20 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)?
  31. 31.🧮 Resistors of 330 Ω, 150 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 An 11 V battery is joined to 5 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  33. 33.🧮 Resistors of 10 Ω, 100 Ω, 150 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 Resistors of 220 Ω, 470 Ω, 68 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 Resistors of 22 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 Resistors of 50 Ω, 470 Ω, 50 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 A 1.8 V battery is joined to 12 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  39. 39.🧮 A 2.2 V battery is joined to 8 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  40. 40.🧮 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)?

Answer key

  1. 1
  2. bigger
  3. 25
  4. 10
  5. 110
  6. 0.1
  7. 20
  8. 50
  9. 100
  10. 20
  11. 0.1
  12. less than either one
  13. 560
  14. 190
  15. 0.5
  16. 88
  17. 50
  18. 55
  19. 32
  20. 570
  21. 0.2
  22. 0.2
  23. 5
  24. 5
  25. 160
  26. 10
  27. 0.1
  28. 0.25
  29. 0.5
  30. 40
  31. 950
  32. 1
  33. 410
  34. 778
  35. 32
  36. 720
  37. 5
  38. 0.1
  39. 0.2
  40. 350

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