← Resistors in series and parallel lesson New set →

Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 125 · 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 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 A 330 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)?
  3. 3.🧮 Adding another resistor in series makes the total resistance … (a) stay the same (b) bigger (c) smaller (d) zero
  4. 4.🧮 Two resistors in parallel give a total that is … (a) their sum (b) more than either one (c) always zero (d) less than either one
  5. 5.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  6. 6.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 A 16 V battery is joined to 12 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  9. 9.🧮 A 68 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.🧮 Resistors of 22 Ω, 100 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 Resistors of 22 Ω, 68 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  12. 12.🧮 Resistors of 100 Ω, 50 Ω, 100 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  13. 13.🧮 Resistors of 10 Ω, 20 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 A 50 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)?
  15. 15.🧮 A 470 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)?
  16. 16.🧮 A 33 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)?
  17. 17.🧮 A 5.5 V battery is joined to 12 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 Resistors of 22 Ω, 22 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 A 33 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.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 A 20 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.🧮 Resistors of 22 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 A 5 V battery is joined to 3 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  24. 24.🧮 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)?
  25. 25.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 Resistors of 150 Ω, 68 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 A 10 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)?
  29. 29.🧮 Resistors of 47 Ω, 50 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 Resistors of 20 Ω, 68 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 A 470 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)?
  32. 32.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 A 1.3 V battery is joined to 10 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  35. 35.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 A 220 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)?
  37. 37.🧮 A 20 V battery is joined to 8 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  38. 38.🧮 Resistors of 50 Ω, 470 Ω, 330 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 Resistors of 22 Ω, 330 Ω, 47 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  40. 40.🧮 A 33 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)?

Answer key

  1. 20
  2. 565
  3. bigger
  4. less than either one
  5. 5
  6. 165
  7. 10
  8. 1
  9. 73
  10. 169
  11. 140
  12. 400
  13. 40
  14. 550
  15. 480
  16. 83
  17. 0.25
  18. 112
  19. 53
  20. 110
  21. 30
  22. 122
  23. 1
  24. 350
  25. 5
  26. 25
  27. 238
  28. 30
  29. 130
  30. 110
  31. 580
  32. 50
  33. 20
  34. 0.1
  35. 500
  36. 330
  37. 1
  38. 870
  39. 499
  40. 43

Free electronics lessons, practice and worksheets at talentjr.in/electronics-for-kids