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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 144 · 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.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) smaller (c) bigger (d) stay the same
  4. 4.🧮 Two resistors in parallel give a total that is … (a) always zero (b) less than either one (c) their sum (d) more than either one
  5. 5.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  6. 6.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 A 68 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)?
  8. 8.🧮 A 3 V battery is joined to 3 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  9. 9.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 A 10 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)?
  11. 11.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 A 3 V battery is joined to 12 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  13. 13.🧮 A 50 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)?
  14. 14.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 A 1.2 V battery is joined to 4 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  19. 19.🧮 A 330 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)?
  20. 20.🧮 Resistors of 10 Ω, 22 Ω, 220 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  21. 21.🧮 A 5 V battery is joined to 2 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  22. 22.🧮 A 1.4 V battery is joined to 4 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  23. 23.🧮 A 220 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)?
  24. 24.🧮 Resistors of 47 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 A 10 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)?
  26. 26.🧮 A 33 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)?
  27. 27.🧮 A 12 V battery is joined to 10 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  28. 28.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 Resistors of 470 Ω, 47 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 A 24 V battery is joined to 12 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  31. 31.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 A 68 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)?
  33. 33.🧮 A 0.9 V battery is joined to 3 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  34. 34.🧮 A 10 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)?
  35. 35.🧮 A 22 V battery is joined to 10 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  36. 36.🧮 Resistors of 100 Ω, 20 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 Resistors of 150 Ω, 150 Ω and 22 Ω are joined in series. 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 1.25 V battery is joined to 3 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  40. 40.🧮 A 1.1 V battery is joined to 3 Ω and 8 Ω resistors in series. What current flows (in amperes)? =

Answer key

  1. 5
  2. 20
  3. bigger
  4. less than either one
  5. 100
  6. 20
  7. 303
  8. 0.5
  9. 50
  10. 245
  11. 100
  12. 0.2
  13. 215
  14. 5
  15. 10
  16. 110
  17. 5
  18. 0.1
  19. 495
  20. 262
  21. 0.5
  22. 0.2
  23. 230
  24. 80
  25. 20
  26. 533
  27. 1
  28. 25
  29. 527
  30. 1
  31. 500
  32. 73
  33. 0.1
  34. 110
  35. 1
  36. 220
  37. 322
  38. 235
  39. 0.25
  40. 0.1

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