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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 352 · 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.🧮 Resistors of 150 Ω, 10 Ω, 33 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  3. 3.🧮 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)?
  4. 4.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  6. 6.🧮 Resistors of 47 Ω, 47 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  7. 7.🧮 Adding another resistor in series makes the total resistance … (a) smaller (b) stay the same (c) bigger (d) zero
  8. 8.🧮 A 12 V battery is joined to 10 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  9. 9.🧮 Two resistors in parallel give a total that is … (a) more than either one (b) less than either one (c) always zero (d) their sum
  10. 10.🧮 Resistors of 47 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 A 10 V battery is joined to 8 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  12. 12.🧮 A 0.8 V battery is joined to 5 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  13. 13.🧮 A 0.9 V battery is joined to 5 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  14. 14.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 A 0.9 V battery is joined to 6 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  16. 16.🧮 Resistors of 220 Ω, 470 Ω, 100 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 Resistors of 68 Ω, 47 Ω, 330 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  18. 18.🧮 Resistors of 470 Ω, 330 Ω, 330 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 A 5.5 V battery is joined to 6 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  20. 20.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 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)?
  22. 22.🧮 A 470 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)?
  23. 23.🧮 A 6 V battery is joined to 4 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  24. 24.🧮 A 22 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)?
  25. 25.🧮 A 10 V battery is joined to 4 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  26. 26.🧮 A 10 V battery is joined to 12 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  27. 27.🧮 Resistors of 47 Ω, 330 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 Resistors of 50 Ω, 20 Ω, 50 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 Resistors of 100 Ω, 33 Ω, 10 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 A 2.5 V battery is joined to 2 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  32. 32.🧮 Resistors of 50 Ω, 20 Ω, 20 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 A 2.2 V battery is joined to 8 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  34. 34.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 A 100 Ω resistor is joined in series with two equal 220 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  36. 36.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 Resistors of 68 Ω and 10 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.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. 10
  2. 213
  3. 110
  4. 100
  5. 10
  6. 116
  7. bigger
  8. 1
  9. less than either one
  10. 80
  11. 1
  12. 0.1
  13. 0.1
  14. 5
  15. 0.1
  16. 1010
  17. 492
  18. 1150
  19. 0.5
  20. 5
  21. 57
  22. 490
  23. 1
  24. 42
  25. 1
  26. 0.5
  27. 424
  28. 50
  29. 188
  30. 190
  31. 0.25
  32. 310
  33. 0.2
  34. 20
  35. 210
  36. 5
  37. 25
  38. 78
  39. 25
  40. 25

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