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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 413 · 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 1.8 V battery is joined to 5 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  2. 2.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 A 68 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)?
  4. 4.🧮 Adding another resistor in series makes the total resistance … (a) stay the same (b) bigger (c) zero (d) smaller
  5. 5.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  6. 6.🧮 Two equal 100 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) always zero (d) their sum
  8. 8.🧮 Resistors of 68 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  9. 9.🧮 A 2.8 V battery is joined to 12 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  10. 10.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 A 470 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)?
  12. 12.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 Resistors of 470 Ω, 33 Ω, 47 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 Resistors of 330 Ω, 10 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 A 5.5 V battery is joined to 10 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 Resistors of 220 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 Resistors of 100 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  20. 20.🧮 A 2.4 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 8 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  22. 22.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 Resistors of 68 Ω, 10 Ω, 220 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 A 20 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)?
  25. 25.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 A 220 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)?
  27. 27.🧮 A 10 V battery is joined to 4 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  28. 28.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 A 1.25 V battery is joined to 3 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  30. 30.🧮 A 1.6 V battery is joined to 10 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  31. 31.🧮 A 2.4 V battery is joined to 10 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  32. 32.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 A 1.7 V battery is joined to 5 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  36. 36.🧮 A 68 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)?
  37. 37.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 A 33 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)?
  40. 40.🧮 A 3.2 V battery is joined to 12 Ω and 4 Ω resistors in series. What current flows (in amperes)? =

Answer key

  1. 0.2
  2. 20
  3. 78
  4. bigger
  5. 25
  6. 50
  7. less than either one
  8. 115
  9. 0.2
  10. 10
  11. 495
  12. 100
  13. 600
  14. 110
  15. 5
  16. 670
  17. 0.25
  18. 288
  19. 200
  20. 0.2
  21. 0.1
  22. 500
  23. 398
  24. 255
  25. 25
  26. 270
  27. 1
  28. 5
  29. 0.25
  30. 0.1
  31. 0.2
  32. 20
  33. 25
  34. 100
  35. 0.1
  36. 178
  37. 10
  38. 235
  39. 198
  40. 0.2

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