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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 435 · 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.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  4. 4.🧮 A 10 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)?
  5. 5.🧮 Resistors of 150 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  6. 6.🧮 Resistors of 10 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  7. 7.🧮 Resistors of 33 Ω, 33 Ω, 470 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  8. 8.🧮 Resistors of 10 Ω, 10 Ω, 150 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  9. 9.🧮 Adding another resistor in series makes the total resistance … (a) smaller (b) zero (c) bigger (d) stay the same
  10. 10.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 Two resistors in parallel give a total that is … (a) their sum (b) always zero (c) less than either one (d) more than either one
  12. 12.🧮 A 1.4 V battery is joined to 12 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  13. 13.🧮 A 150 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)?
  14. 14.🧮 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)?
  15. 15.🧮 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)?
  16. 16.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  19. 19.🧮 Resistors of 470 Ω, 150 Ω, 10 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  20. 20.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 Resistors of 50 Ω, 22 Ω, 150 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 Resistors of 68 Ω, 22 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 Resistors of 470 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 A 20 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)?
  26. 26.🧮 A 3 V battery is joined to 12 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  27. 27.🧮 Resistors of 150 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 A 0.9 V battery is joined to 3 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  29. 29.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 A 4 V battery is joined to 4 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  31. 31.🧮 A 7 V battery is joined to 2 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  32. 32.🧮 A 0.4 V battery is joined to 2 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  33. 33.🧮 Resistors of 100 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 A 1 V battery is joined to 2 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  37. 37.🧮 Resistors of 68 Ω, 10 Ω, 47 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 Five equal 100 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 40 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  40. 40.🧮 Resistors of 33 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. 500
  2. 100
  3. 10
  4. 35
  5. 200
  6. 43
  7. 583
  8. 320
  9. bigger
  10. 50
  11. less than either one
  12. 0.1
  13. 170
  14. 38
  15. 522
  16. 5
  17. 20
  18. 5
  19. 1100
  20. 235
  21. 272
  22. 110
  23. 100
  24. 480
  25. 70
  26. 0.2
  27. 480
  28. 0.1
  29. 5
  30. 0.25
  31. 1
  32. 0.1
  33. 120
  34. 10
  35. 110
  36. 0.25
  37. 345
  38. 20
  39. 53
  40. 101

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