← Resistors in series and parallel lesson New set →

Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 20 · 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 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 Adding another resistor in series makes the total resistance … (a) bigger (b) zero (c) stay the same (d) smaller
  3. 3.🧮 Two resistors in parallel give a total that is … (a) always zero (b) their sum (c) less than either one (d) more than either one
  4. 4.🧮 Resistors of 10 Ω, 33 Ω, 50 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  5. 5.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  6. 6.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 Resistors of 470 Ω, 100 Ω, 150 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 A 100 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)?
  11. 11.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 An 11 V battery is joined to 12 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  13. 13.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 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)?
  15. 15.🧮 A 2 V battery is joined to 2 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  16. 16.🧮 A 68 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)?
  17. 17.🧮 A 1 V battery is joined to 3 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 Resistors of 330 Ω, 10 Ω, 50 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 A 7 V battery is joined to 12 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  20. 20.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 Resistors of 33 Ω, 22 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 Resistors of 33 Ω, 20 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 Resistors of 50 Ω, 150 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 A 5 V battery is joined to 2 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  27. 27.🧮 Resistors of 22 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 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)?
  29. 29.🧮 Resistors of 47 Ω, 47 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 A 47 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)?
  32. 32.🧮 A 2.5 V battery is joined to 2 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  33. 33.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 A 0.9 V battery is joined to 5 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  35. 35.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 Resistors of 33 Ω, 50 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 A 1.25 V battery is joined to 2 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  38. 38.🧮 A 1.75 V battery is joined to 5 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  39. 39.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  40. 40.🧮 Resistors of 22 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. 235
  2. bigger
  3. less than either one
  4. 243
  5. 500
  6. 50
  7. 25
  8. 25
  9. 730
  10. 600
  11. 25
  12. 0.5
  13. 100
  14. 150
  15. 0.2
  16. 168
  17. 0.2
  18. 400
  19. 0.5
  20. 20
  21. 65
  22. 10
  23. 63
  24. 530
  25. 50
  26. 0.5
  27. 32
  28. 350
  29. 194
  30. 100
  31. 52
  32. 0.25
  33. 25
  34. 0.1
  35. 10
  36. 133
  37. 0.25
  38. 0.25
  39. 5
  40. 90

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