← Resistors in series and parallel lesson New set →

Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 225 · 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 V battery is joined to 12 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  2. 2.🧮 Adding another resistor in series makes the total resistance … (a) smaller (b) zero (c) stay the same (d) bigger
  3. 3.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  4. 4.🧮 Two resistors in parallel give a total that is … (a) their sum (b) more than either one (c) less than either one (d) always zero
  5. 5.🧮 A 47 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)?
  6. 6.🧮 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)?
  7. 7.🧮 Resistors of 220 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  8. 8.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 A 4 V battery is joined to 10 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  10. 10.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 A 50 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)?
  14. 14.🧮 A 50 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)?
  15. 15.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 A 20 V battery is joined to 12 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 A 4.4 V battery is joined to 12 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  19. 19.🧮 Resistors of 68 Ω, 20 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  20. 20.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 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)?
  22. 22.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 Resistors of 20 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 A 330 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)?
  26. 26.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  28. 28.🧮 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)?
  29. 29.🧮 A 150 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)?
  30. 30.🧮 A 1.4 V battery is joined to 3 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  31. 31.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 Resistors of 100 Ω, 22 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 Resistors of 68 Ω, 470 Ω, 10 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 Resistors of 220 Ω, 47 Ω, 50 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 A 2 V battery is joined to 5 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  38. 38.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 Resistors of 150 Ω, 100 Ω, 47 Ω and 20 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. bigger
  3. 50
  4. less than either one
  5. 157
  6. 168
  7. 320
  8. 25
  9. 0.2
  10. 10
  11. 165
  12. 5
  13. 285
  14. 55
  15. 25
  16. 50
  17. 1
  18. 0.2
  19. 156
  20. 5
  21. 600
  22. 20
  23. 110
  24. 30
  25. 495
  26. 100
  27. 10
  28. 565
  29. 160
  30. 0.2
  31. 10
  32. 144
  33. 500
  34. 768
  35. 339
  36. 100
  37. 0.2
  38. 5
  39. 317
  40. 50

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