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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 475 · 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.🧮 An 11 V battery is joined to 8 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  2. 2.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  4. 4.🧮 A 7 V battery is joined to 4 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  5. 5.🧮 A 0.8 V battery is joined to 5 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  6. 6.🧮 A 22 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.🧮 A 4.5 V battery is joined to 3 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  8. 8.🧮 Adding another resistor in series makes the total resistance … (a) stay the same (b) bigger (c) smaller (d) zero
  9. 9.🧮 A 1.2 V battery is joined to 4 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  10. 10.🧮 Two resistors in parallel give a total that is … (a) always zero (b) their sum (c) less than either one (d) more than either one
  11. 11.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 Resistors of 10 Ω, 50 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  15. 15.🧮 Resistors of 330 Ω, 100 Ω, 68 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 Resistors of 33 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 Resistors of 100 Ω, 50 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  18. 18.🧮 A 22 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)?
  19. 19.🧮 A 2 V battery is joined to 6 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  20. 20.🧮 A 4.5 V battery is joined to 6 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  21. 21.🧮 Resistors of 33 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 A 100 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)?
  25. 25.🧮 Resistors of 20 Ω, 220 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 Resistors of 100 Ω, 330 Ω, 50 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  28. 28.🧮 A 2.8 V battery is joined to 8 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  29. 29.🧮 A 33 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)?
  30. 30.🧮 Resistors of 50 Ω, 220 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 Resistors of 68 Ω, 220 Ω, 10 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 Resistors of 470 Ω, 47 Ω, 47 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 Resistors of 220 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 Resistors of 330 Ω, 100 Ω, 150 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 Resistors of 50 Ω, 330 Ω, 22 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 A 2.75 V battery is joined to 5 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  39. 39.🧮 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)?
  40. 40.🧮 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)?

Answer key

  1. 1
  2. 50
  3. 235
  4. 0.5
  5. 0.1
  6. 42
  7. 0.5
  8. bigger
  9. 0.1
  10. less than either one
  11. 5
  12. 20
  13. 100
  14. 530
  15. 718
  16. 503
  17. 250
  18. 132
  19. 0.25
  20. 0.5
  21. 55
  22. 110
  23. 20
  24. 120
  25. 308
  26. 490
  27. 165
  28. 0.2
  29. 83
  30. 338
  31. 320
  32. 586
  33. 253
  34. 100
  35. 800
  36. 500
  37. 449
  38. 0.25
  39. 53
  40. 57

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