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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 196 · 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.🧮 A 20 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)?
  2. 2.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) stay the same (c) bigger (d) smaller
  4. 4.🧮 Two resistors in parallel give a total that is … (a) their sum (b) less than either one (c) always zero (d) more than either one
  5. 5.🧮 A 3 V battery is joined to 3 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  6. 6.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 Resistors of 50 Ω, 33 Ω, 68 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  9. 9.🧮 A 150 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)?
  10. 10.🧮 A 20 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)?
  11. 11.🧮 Resistors of 10 Ω, 470 Ω, 68 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  12. 12.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 Resistors of 330 Ω, 10 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 A 330 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)?
  17. 17.🧮 A 1 V battery is joined to 2 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 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)?
  19. 19.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 Resistors of 10 Ω, 47 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 A 50 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)?
  25. 25.🧮 Resistors of 22 Ω, 50 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 A 5 V battery is joined to 8 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  27. 27.🧮 Resistors of 33 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 Resistors of 20 Ω, 10 Ω, 100 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  29. 29.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 Resistors of 10 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 A 3.75 V battery is joined to 3 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  32. 32.🧮 A 22 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)?
  33. 33.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 A 2.25 V battery is joined to 5 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  37. 37.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 Resistors of 330 Ω, 47 Ω, 33 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 Three equal 150 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 100 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?

Answer key

  1. 25
  2. 500
  3. bigger
  4. less than either one
  5. 0.5
  6. 5
  7. 5
  8. 251
  9. 155
  10. 185
  11. 1018
  12. 100
  13. 350
  14. 25
  15. 100
  16. 495
  17. 0.1
  18. 385
  19. 20
  20. 5
  21. 50
  22. 90
  23. 20
  24. 75
  25. 542
  26. 0.25
  27. 66
  28. 350
  29. 25
  30. 340
  31. 0.25
  32. 27
  33. 10
  34. 10
  35. 10
  36. 0.25
  37. 50
  38. 560
  39. 50
  40. 150

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