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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 440 · 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.🧮 Adding another resistor in series makes the total resistance … (a) bigger (b) stay the same (c) smaller (d) zero
  2. 2.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  4. 4.🧮 Two resistors in parallel give a total that is … (a) always zero (b) more than either one (c) their sum (d) less than either one
  5. 5.🧮 Resistors of 220 Ω, 22 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  6. 6.🧮 Resistors of 47 Ω, 22 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  7. 7.🧮 Resistors of 22 Ω, 10 Ω, 47 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  8. 8.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 Resistors of 470 Ω, 330 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 A 4 V battery is joined to 4 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  13. 13.🧮 A 1.4 V battery is joined to 3 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  14. 14.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 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)?
  16. 16.🧮 Resistors of 33 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 Resistors of 220 Ω, 150 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  18. 18.🧮 Resistors of 22 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 A 330 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)?
  21. 21.🧮 A 1 V battery is joined to 8 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  22. 22.🧮 A 20 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)?
  23. 23.🧮 A 3.6 V battery is joined to 6 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  24. 24.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  25. 25.🧮 Resistors of 47 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 A 47 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.🧮 Resistors of 10 Ω, 20 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 Resistors of 20 Ω, 470 Ω, 330 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  29. 29.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 Resistors of 470 Ω, 50 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 A 220 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)?
  32. 32.🧮 Resistors of 150 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 A 5 V battery is joined to 2 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  34. 34.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 A 1.1 V battery is joined to 8 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  36. 36.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 Resistors of 47 Ω, 10 Ω, 33 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 A 9 V battery is joined to 8 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  39. 39.🧮 Resistors of 470 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  40. 40.🧮 A 50 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)?

Answer key

  1. bigger
  2. 235
  3. 165
  4. less than either one
  5. 252
  6. 539
  7. 179
  8. 10
  9. 1020
  10. 20
  11. 10
  12. 0.25
  13. 0.2
  14. 25
  15. 385
  16. 183
  17. 520
  18. 42
  19. 50
  20. 430
  21. 0.1
  22. 30
  23. 0.2
  24. 500
  25. 267
  26. 547
  27. 180
  28. 870
  29. 10
  30. 740
  31. 245
  32. 183
  33. 0.5
  34. 5
  35. 0.1
  36. 10
  37. 420
  38. 0.5
  39. 940
  40. 550

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