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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 140 · 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 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 A 1.5 V battery is joined to 12 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  3. 3.🧮 Adding another resistor in series makes the total resistance … (a) bigger (b) zero (c) smaller (d) stay the same
  4. 4.🧮 A 1.7 V battery is joined to 12 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  5. 5.🧮 A 7 V battery is joined to 8 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  6. 6.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 A 50 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)?
  10. 10.🧮 Two resistors in parallel give a total that is … (a) their sum (b) always zero (c) more than either one (d) less than either one
  11. 11.🧮 A 220 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 100 Ω, 100 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  13. 13.🧮 A 13 V battery is joined to 5 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  14. 14.🧮 A 4.5 V battery is joined to 6 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  15. 15.🧮 Resistors of 68 Ω, 22 Ω, 220 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 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)?
  17. 17.🧮 Resistors of 33 Ω, 10 Ω, 20 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  18. 18.🧮 A 47 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)?
  19. 19.🧮 A 22 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)?
  20. 20.🧮 A 9 V battery is joined to 4 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  21. 21.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 Resistors of 68 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 A 20 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)?
  25. 25.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 A 33 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)?
  27. 27.🧮 A 330 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)?
  28. 28.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 A 1.4 V battery is joined to 5 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  31. 31.🧮 A 330 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)?
  32. 32.🧮 Resistors of 68 Ω, 10 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 A 10 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)?
  34. 34.🧮 Resistors of 33 Ω, 22 Ω, 20 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 Resistors of 20 Ω, 22 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 A 6 V battery is joined to 4 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  38. 38.🧮 Resistors of 20 Ω, 20 Ω, 22 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  40. 40.🧮 A 100 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)?

Answer key

  1. 110
  2. 0.1
  3. bigger
  4. 0.1
  5. 0.5
  6. 50
  7. 235
  8. 5
  9. 70
  10. less than either one
  11. 240
  12. 210
  13. 1
  14. 0.5
  15. 360
  16. 170
  17. 163
  18. 212
  19. 122
  20. 1
  21. 25
  22. 136
  23. 50
  24. 255
  25. 10
  26. 133
  27. 830
  28. 25
  29. 10
  30. 0.2
  31. 350
  32. 146
  33. 60
  34. 545
  35. 100
  36. 372
  37. 1
  38. 212
  39. 25
  40. 105

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