← Resistors in series and parallel lesson New set →

Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 358 · 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 5.5 V battery is joined to 12 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  2. 2.🧮 Three equal 60 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) stay the same (b) bigger (c) zero (d) smaller
  4. 4.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  6. 6.🧮 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)?
  7. 7.🧮 Two resistors in parallel give a total that is … (a) their sum (b) less than either one (c) more than either one (d) always zero
  8. 8.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 A 3.6 V battery is joined to 8 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  10. 10.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 Resistors of 22 Ω, 10 Ω, 68 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  12. 12.🧮 A 1.2 V battery is joined to 4 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  13. 13.🧮 Resistors of 150 Ω, 10 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 A 1 V battery is joined to 2 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  15. 15.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  19. 19.🧮 Two equal 20 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.🧮 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)?
  22. 22.🧮 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)?
  23. 23.🧮 Resistors of 50 Ω, 10 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  25. 25.🧮 A 100 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.🧮 A 20 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)?
  27. 27.🧮 A 100 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)?
  28. 28.🧮 A 4 V battery is joined to 12 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  29. 29.🧮 Resistors of 47 Ω, 330 Ω, 10 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 A 100 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)?
  31. 31.🧮 Resistors of 150 Ω, 33 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 Resistors of 22 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 A 7.5 V battery is joined to 5 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  34. 34.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 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)?
  37. 37.🧮 Resistors of 20 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 Resistors of 47 Ω, 100 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  40. 40.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. 0.25
  2. 20
  3. bigger
  4. 50
  5. 5
  6. 385
  7. less than either one
  8. 100
  9. 0.2
  10. 50
  11. 430
  12. 0.2
  13. 170
  14. 0.25
  15. 20
  16. 5
  17. 50
  18. 25
  19. 10
  20. 5
  21. 385
  22. 42
  23. 110
  24. 10
  25. 110
  26. 70
  27. 200
  28. 0.2
  29. 717
  30. 335
  31. 233
  32. 72
  33. 0.5
  34. 100
  35. 25
  36. 705
  37. 42
  38. 500
  39. 215
  40. 50

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