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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 618 · 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.

NameDateTime takenScore ___ / 40
  1. 1.🧮 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)?
  2. 2.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 A 22 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.🧮 A 4 V battery is joined to 2 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  5. 5.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  6. 6.🧮 A 33 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)?
  7. 7.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 A 1 V battery is joined to 6 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  9. 9.🧮 Adding another resistor in series makes the total resistance … (a) bigger (b) smaller (c) zero (d) stay the same
  10. 10.🧮 A 33 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)?
  11. 11.🧮 A 1.5 V battery is joined to 2 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  12. 12.🧮 Two resistors in parallel give a total that is … (a) more than either one (b) always zero (c) their sum (d) less than either one
  13. 13.🧮 Resistors of 50 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 Resistors of 50 Ω, 47 Ω, 220 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  15. 15.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 Resistors of 220 Ω, 10 Ω, 33 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 A 1.1 V battery is joined to 5 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  22. 22.🧮 Resistors of 68 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 A 0.8 V battery is joined to 3 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  25. 25.🧮 Resistors of 47 Ω, 20 Ω, 220 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 A 150 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)?
  28. 28.🧮 A 68 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)?
  29. 29.🧮 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)?
  30. 30.🧮 Four equal 200 Ω resistors are joined in parallel. 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.🧮 Resistors of 470 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 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)?
  34. 34.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 An 8 V battery is joined to 12 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  36. 36.🧮 A 2.8 V battery is joined to 8 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  37. 37.🧮 Resistors of 33 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 A 50 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)?
  39. 39.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  40. 40.🧮 Resistors of 470 Ω, 220 Ω, 50 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. 40
  2. 20
  3. 122
  4. 1
  5. 10
  6. 53
  7. 100
  8. 0.1
  9. bigger
  10. 38
  11. 0.25
  12. less than either one
  13. 150
  14. 350
  15. 165
  16. 20
  17. 25
  18. 593
  19. 10
  20. 50
  21. 0.1
  22. 398
  23. 100
  24. 0.1
  25. 757
  26. 25
  27. 385
  28. 233
  29. 570
  30. 50
  31. 25
  32. 570
  33. 315
  34. 10
  35. 0.5
  36. 0.2
  37. 503
  38. 70
  39. 100
  40. 1070

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