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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 515 · 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 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 Resistors of 100 Ω, 10 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  3. 3.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  4. 4.🧮 A 0.7 V battery is joined to 3 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  5. 5.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) smaller (c) bigger (d) stay the same
  6. 6.🧮 A 3 V battery is joined to 2 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  7. 7.🧮 A 3 V battery is joined to 3 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  8. 8.🧮 Two resistors in parallel give a total that is … (a) always zero (b) their sum (c) more than either one (d) less than either one
  9. 9.🧮 Resistors of 47 Ω, 150 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 Resistors of 470 Ω, 20 Ω, 470 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  12. 12.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 A 50 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)?
  14. 14.🧮 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)?
  15. 15.🧮 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)?
  16. 16.🧮 Resistors of 10 Ω, 47 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  19. 19.🧮 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)?
  20. 20.🧮 An 8 V battery is joined to 6 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  21. 21.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 A 3.5 V battery is joined to 4 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  23. 23.🧮 A 150 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)?
  24. 24.🧮 A 6 V battery is joined to 10 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  25. 25.🧮 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)?
  26. 26.🧮 A 2 V battery is joined to 5 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  27. 27.🧮 Resistors of 220 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 Resistors of 10 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  29. 29.🧮 Resistors of 68 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 Resistors of 470 Ω, 330 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 A 1.8 V battery is joined to 5 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  32. 32.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 Resistors of 68 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 Resistors of 50 Ω, 68 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 A 220 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)?
  36. 36.🧮 Resistors of 33 Ω, 10 Ω, 33 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 Resistors of 22 Ω, 47 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 Resistors of 20 Ω, 22 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  40. 40.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. 5
  2. 330
  3. 235
  4. 0.1
  5. bigger
  6. 0.5
  7. 0.5
  8. less than either one
  9. 247
  10. 10
  11. 1028
  12. 100
  13. 55
  14. 60
  15. 105
  16. 67
  17. 20
  18. 100
  19. 42
  20. 0.5
  21. 10
  22. 0.5
  23. 250
  24. 0.5
  25. 40
  26. 0.25
  27. 242
  28. 43
  29. 118
  30. 822
  31. 0.2
  32. 10
  33. 136
  34. 140
  35. 385
  36. 98
  37. 89
  38. 142
  39. 5
  40. 10

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