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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 324 · 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 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 A 14 V battery is joined to 4 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  3. 3.🧮 A 1 V battery is joined to 8 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  4. 4.🧮 Resistors of 20 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  5. 5.🧮 A 20 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)?
  6. 6.🧮 Adding another resistor in series makes the total resistance … (a) smaller (b) zero (c) stay the same (d) bigger
  7. 7.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 A 12 V battery is joined to 4 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  9. 9.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 A 20 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)?
  11. 11.🧮 A 20 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)?
  12. 12.🧮 Resistors of 470 Ω, 220 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  13. 13.🧮 Resistors of 20 Ω, 100 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 Two resistors in parallel give a total that is … (a) more than either one (b) less than either one (c) their sum (d) always zero
  16. 16.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 A 1.4 V battery is joined to 2 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 Resistors of 470 Ω, 150 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 Resistors of 22 Ω, 470 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  20. 20.🧮 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)?
  21. 21.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 A 2 V battery is joined to 2 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  24. 24.🧮 A 3.2 V battery is joined to 4 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  25. 25.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 Resistors of 33 Ω, 100 Ω, 150 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  28. 28.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 Resistors of 10 Ω, 50 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 Resistors of 68 Ω, 150 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 A 470 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)?
  33. 33.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 A 47 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)?
  38. 38.🧮 A 68 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)?
  39. 39.🧮 An 8 V battery is joined to 4 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  40. 40.🧮 Resistors of 330 Ω, 50 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. 10
  2. 1
  3. 0.1
  4. 53
  5. 520
  6. bigger
  7. 25
  8. 1
  9. 165
  10. 120
  11. 40
  12. 712
  13. 167
  14. 100
  15. less than either one
  16. 10
  17. 0.1
  18. 770
  19. 592
  20. 57
  21. 5
  22. 500
  23. 0.2
  24. 0.2
  25. 25
  26. 305
  27. 50
  28. 110
  29. 5
  30. 390
  31. 268
  32. 970
  33. 50
  34. 100
  35. 20
  36. 20
  37. 52
  38. 93
  39. 0.5
  40. 530

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