← Resistors in series and parallel lesson New set →

Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 276 · 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 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 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)?
  4. 4.🧮 Two resistors in parallel give a total that is … (a) less than either one (b) their sum (c) more than either one (d) always zero
  5. 5.🧮 Resistors of 68 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  6. 6.🧮 Resistors of 22 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  7. 7.🧮 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)?
  8. 8.🧮 Resistors of 10 Ω, 20 Ω, 100 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  9. 9.🧮 Resistors of 47 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 Adding another resistor in series makes the total resistance … (a) smaller (b) stay the same (c) zero (d) bigger
  12. 12.🧮 A 3 V battery is joined to 12 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  13. 13.🧮 A 7 V battery is joined to 2 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  14. 14.🧮 A 2.8 V battery is joined to 8 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  15. 15.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 Resistors of 150 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 Resistors of 10 Ω, 68 Ω, 68 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  18. 18.🧮 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)?
  19. 19.🧮 A 50 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 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 A 33 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)?
  22. 22.🧮 Resistors of 330 Ω, 150 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 Resistors of 47 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 A 10 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)?
  26. 26.🧮 Resistors of 33 Ω, 22 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 A 0.6 V battery is joined to 3 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  28. 28.🧮 Resistors of 220 Ω, 47 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  29. 29.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 Resistors of 330 Ω, 22 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 An 8.5 V battery is joined to 5 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  32. 32.🧮 A 470 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)?
  33. 33.🧮 Resistors of 20 Ω, 470 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 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)?
  36. 36.🧮 Resistors of 150 Ω, 10 Ω, 20 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 A 6.5 V battery is joined to 3 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  38. 38.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 A 1.2 V battery is joined to 2 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  40. 40.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. 110
  2. 100
  3. 480
  4. less than either one
  5. 218
  6. 44
  7. 30
  8. 460
  9. 377
  10. 50
  11. bigger
  12. 0.2
  13. 0.5
  14. 0.2
  15. 10
  16. 197
  17. 214
  18. 75
  19. 70
  20. 165
  21. 38
  22. 527
  23. 50
  24. 147
  25. 20
  26. 385
  27. 0.1
  28. 367
  29. 5
  30. 362
  31. 0.5
  32. 705
  33. 523
  34. 25
  35. 53
  36. 230
  37. 0.5
  38. 100
  39. 0.2
  40. 235

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