← Resistors in series and parallel lesson New set →

Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 310 · 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 6 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  2. 2.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 A 5 V battery is joined to 12 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  4. 4.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 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)?
  6. 6.🧮 A 1.5 V battery is joined to 2 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  7. 7.🧮 A 22 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.🧮 A 10 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)?
  9. 9.🧮 A 47 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)?
  10. 10.🧮 A 10 V battery is joined to 5 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  11. 11.🧮 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)?
  12. 12.🧮 Resistors of 22 Ω, 33 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  13. 13.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 A 33 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)?
  16. 16.🧮 A 1.3 V battery is joined to 8 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  17. 17.🧮 Adding another resistor in series makes the total resistance … (a) smaller (b) zero (c) stay the same (d) bigger
  18. 18.🧮 Two resistors in parallel give a total that is … (a) more than either one (b) less than either one (c) always zero (d) their sum
  19. 19.🧮 Resistors of 33 Ω, 220 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  20. 20.🧮 Two equal 40 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 20 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  22. 22.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 A 1.2 V battery is joined to 2 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  25. 25.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 A 7 V battery is joined to 10 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  28. 28.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 A 0.5 V battery is joined to 2 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  30. 30.🧮 A 4 V battery is joined to 12 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  31. 31.🧮 Resistors of 220 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 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)?
  33. 33.🧮 Resistors of 47 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 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)?
  35. 35.🧮 Resistors of 47 Ω, 22 Ω, 470 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 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)?
  37. 37.🧮 Resistors of 100 Ω, 10 Ω, 68 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 A 2 V battery is joined to 12 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  39. 39.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  40. 40.🧮 A 20 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)?

Answer key

  1. 0.5
  2. 5
  3. 0.25
  4. 10
  5. 303
  6. 0.25
  7. 257
  8. 245
  9. 282
  10. 1
  11. 495
  12. 205
  13. 100
  14. 25
  15. 38
  16. 0.1
  17. bigger
  18. less than either one
  19. 286
  20. 20
  21. 110
  22. 235
  23. 10
  24. 0.2
  25. 100
  26. 5
  27. 0.5
  28. 5
  29. 0.1
  30. 0.2
  31. 270
  32. 25
  33. 69
  34. 285
  35. 549
  36. 200
  37. 508
  38. 0.1
  39. 165
  40. 130

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