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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 102 · 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.🧮 Resistors of 33 Ω, 33 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  3. 3.🧮 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
  4. 4.🧮 Resistors of 47 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  5. 5.🧮 Adding another resistor in series makes the total resistance … (a) stay the same (b) bigger (c) zero (d) smaller
  6. 6.🧮 A 7 V battery is joined to 8 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  7. 7.🧮 A 33 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 47 Ω, 68 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  9. 9.🧮 Resistors of 22 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 Resistors of 10 Ω, 150 Ω, 68 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 A 220 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.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 Resistors of 20 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  15. 15.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 Resistors of 470 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  18. 18.🧮 A 1.8 V battery is joined to 6 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  19. 19.🧮 Resistors of 50 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  20. 20.🧮 A 100 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)?
  21. 21.🧮 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)?
  22. 22.🧮 A 220 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)?
  23. 23.🧮 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)?
  24. 24.🧮 A 6 V battery is joined to 4 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  25. 25.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 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)?
  28. 28.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 Resistors of 10 Ω, 33 Ω, 47 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 A 2 V battery is joined to 6 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  32. 32.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 Resistors of 100 Ω, 330 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 Resistors of 47 Ω, 330 Ω, 47 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 Resistors of 470 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 Resistors of 47 Ω, 470 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 Resistors of 33 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 A 3 V battery is joined to 10 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  40. 40.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. 5
  2. 134
  3. less than either one
  4. 67
  5. bigger
  6. 0.5
  7. 268
  8. 137
  9. 44
  10. 275
  11. 385
  12. 100
  13. 10
  14. 120
  15. 50
  16. 235
  17. 570
  18. 0.1
  19. 520
  20. 265
  21. 520
  22. 720
  23. 212
  24. 1
  25. 10
  26. 100
  27. 15
  28. 100
  29. 500
  30. 190
  31. 0.2
  32. 100
  33. 580
  34. 524
  35. 520
  36. 585
  37. 83
  38. 110
  39. 0.2
  40. 20

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