← Resistors in series and parallel lesson New set →

Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 865 · 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.🧮 Two resistors in parallel give a total that is … (a) more than either one (b) their sum (c) always zero (d) less than either one
  2. 2.🧮 Resistors of 33 Ω, 68 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  3. 3.🧮 A 20 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)?
  4. 4.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 A 20 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.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) smaller (c) stay the same (d) bigger
  9. 9.🧮 Resistors of 22 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 A 100 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)?
  11. 11.🧮 Resistors of 150 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  12. 12.🧮 Resistors of 50 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  13. 13.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 A 10 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.🧮 Resistors of 47 Ω, 100 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 An 8 V battery is joined to 3 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  17. 17.🧮 A 22 V battery is joined to 12 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  19. 19.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 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)?
  21. 21.🧮 Resistors of 470 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 A 1.7 V battery is joined to 5 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  23. 23.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 Resistors of 150 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 A 150 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)?
  26. 26.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 Resistors of 47 Ω, 470 Ω, 68 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 Resistors of 22 Ω, 33 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 A 47 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)?
  32. 32.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 A 470 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)?
  35. 35.🧮 A 47 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)?
  36. 36.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 A 22 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)?
  39. 39.🧮 A 330 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)?
  40. 40.🧮 A 220 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)?

Answer key

  1. less than either one
  2. 111
  3. 70
  4. 20
  5. 255
  6. 20
  7. 10
  8. bigger
  9. 352
  10. 120
  11. 620
  12. 380
  13. 5
  14. 15
  15. 169
  16. 1
  17. 1
  18. 25
  19. 50
  20. 565
  21. 490
  22. 0.1
  23. 10
  24. 300
  25. 175
  26. 10
  27. 805
  28. 100
  29. 5
  30. 123
  31. 147
  32. 50
  33. 5
  34. 495
  35. 212
  36. 20
  37. 235
  38. 187
  39. 380
  40. 455

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