← Resistors in series and parallel lesson New set →

Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 434 · 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.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 A 1.8 V battery is joined to 6 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  4. 4.🧮 Resistors of 330 Ω, 47 Ω, 100 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  5. 5.🧮 Resistors of 33 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  6. 6.🧮 Resistors of 220 Ω, 10 Ω, 33 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  7. 7.🧮 A 68 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.🧮 A 2.75 V battery is joined to 8 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  9. 9.🧮 Resistors of 33 Ω, 100 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 Adding another resistor in series makes the total resistance … (a) smaller (b) zero (c) stay the same (d) bigger
  11. 11.🧮 A 22 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)?
  12. 12.🧮 Resistors of 22 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  13. 13.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 A 7 V battery is joined to 2 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  15. 15.🧮 A 150 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)?
  16. 16.🧮 A 220 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)?
  17. 17.🧮 Resistors of 33 Ω, 220 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  18. 18.🧮 A 1.3 V battery is joined to 3 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  19. 19.🧮 A 68 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)?
  20. 20.🧮 A 3.5 V battery is joined to 6 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  21. 21.🧮 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
  22. 22.🧮 A 3.5 V battery is joined to 8 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  23. 23.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 A 330 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)?
  25. 25.🧮 Resistors of 22 Ω, 20 Ω, 33 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 A 2.5 V battery is joined to 4 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  27. 27.🧮 Resistors of 68 Ω, 47 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 A 0.6 V battery is joined to 3 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  29. 29.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 Resistors of 220 Ω, 10 Ω, 470 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 A 1.4 V battery is joined to 5 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  33. 33.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 A 33 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)?
  35. 35.🧮 A 4.5 V battery is joined to 6 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  36. 36.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 Resistors of 20 Ω, 220 Ω, 470 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  40. 40.🧮 A 150 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)?

Answer key

  1. 5
  2. 500
  3. 0.1
  4. 487
  5. 253
  6. 273
  7. 78
  8. 0.25
  9. 183
  10. bigger
  11. 522
  12. 55
  13. 100
  14. 0.5
  15. 200
  16. 320
  17. 273
  18. 0.1
  19. 73
  20. 0.25
  21. less than either one
  22. 0.25
  23. 20
  24. 440
  25. 545
  26. 0.25
  27. 135
  28. 0.1
  29. 165
  30. 920
  31. 20
  32. 0.2
  33. 100
  34. 43
  35. 0.25
  36. 25
  37. 10
  38. 1040
  39. 10
  40. 250

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