← Resistors in series and parallel lesson New set →

Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 879 · 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 47 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)?
  2. 2.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 Resistors of 47 Ω, 150 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  4. 4.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 Resistors of 10 Ω, 22 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  6. 6.🧮 Adding another resistor in series makes the total resistance … (a) smaller (b) stay the same (c) bigger (d) zero
  7. 7.🧮 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)?
  8. 8.🧮 Resistors of 50 Ω, 20 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  9. 9.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 A 330 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)?
  11. 11.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 Resistors of 20 Ω, 50 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 A 3.75 V battery is joined to 12 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  16. 16.🧮 Two resistors in parallel give a total that is … (a) always zero (b) their sum (c) more than either one (d) less than either one
  17. 17.🧮 A 68 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)?
  18. 18.🧮 An 8 V battery is joined to 6 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  19. 19.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 Resistors of 20 Ω, 10 Ω, 150 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 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)?
  25. 25.🧮 Resistors of 50 Ω, 20 Ω, 20 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 A 12 V battery is joined to 8 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  27. 27.🧮 A 470 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.🧮 Resistors of 22 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  29. 29.🧮 Resistors of 10 Ω, 20 Ω, 68 Ω and 47 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 200 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  31. 31.🧮 Resistors of 470 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 A 24 V battery is joined to 12 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  33. 33.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 A 13 V battery is joined to 10 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  35. 35.🧮 A 20 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)?
  36. 36.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 A 0.8 V battery is joined to 3 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.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  40. 40.🧮 A 6.5 V battery is joined to 8 Ω and 5 Ω resistors in series. What current flows (in amperes)? =

Answer key

  1. 72
  2. 5
  3. 247
  4. 50
  5. 252
  6. bigger
  7. 705
  8. 220
  9. 100
  10. 355
  11. 100
  12. 5
  13. 400
  14. 25
  15. 0.25
  16. less than either one
  17. 568
  18. 1
  19. 25
  20. 10
  21. 235
  22. 213
  23. 500
  24. 170
  25. 310
  26. 1
  27. 570
  28. 72
  29. 145
  30. 200
  31. 492
  32. 1
  33. 5
  34. 1
  35. 520
  36. 10
  37. 0.1
  38. 5
  39. 165
  40. 0.5

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