← Resistors in series and parallel lesson New set →

Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 282 · 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.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 Two resistors in parallel give a total that is … (a) their sum (b) always zero (c) less than either one (d) more than either one
  4. 4.🧮 A 220 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)?
  5. 5.🧮 Resistors of 33 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  6. 6.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 Resistors of 50 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  8. 8.🧮 Resistors of 20 Ω, 10 Ω, 330 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  9. 9.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 Resistors of 20 Ω, 220 Ω, 470 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 A 150 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)?
  12. 12.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 Adding another resistor in series makes the total resistance … (a) stay the same (b) bigger (c) zero (d) smaller
  14. 14.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 Resistors of 220 Ω, 100 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 Resistors of 47 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  18. 18.🧮 Resistors of 10 Ω, 100 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 Resistors of 33 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  20. 20.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 A 3.75 V battery is joined to 10 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  23. 23.🧮 Resistors of 100 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 A 68 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)?
  25. 25.🧮 Resistors of 470 Ω, 220 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  28. 28.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 A 0.8 V battery is joined to 6 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  32. 32.🧮 A 10 V battery is joined to 8 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  33. 33.🧮 A 470 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)?
  34. 34.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 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)?
  38. 38.🧮 Resistors of 10 Ω, 470 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 A 7 V battery is joined to 10 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  40. 40.🧮 A 1.5 V battery is joined to 12 Ω and 3 Ω resistors in series. What current flows (in amperes)? =

Answer key

  1. 50
  2. 10
  3. less than either one
  4. 240
  5. 80
  6. 20
  7. 520
  8. 428
  9. 50
  10. 743
  11. 170
  12. 50
  13. bigger
  14. 25
  15. 342
  16. 110
  17. 80
  18. 120
  19. 363
  20. 20
  21. 10
  22. 0.25
  23. 147
  24. 303
  25. 737
  26. 5
  27. 5
  28. 235
  29. 25
  30. 20
  31. 0.1
  32. 0.5
  33. 970
  34. 10
  35. 5
  36. 100
  37. 25
  38. 950
  39. 0.5
  40. 0.1

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