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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 748 · 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 equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 A 50 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)?
  3. 3.🧮 Resistors of 100 Ω, 33 Ω, 68 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  4. 4.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 A 4 V battery is joined to 10 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  6. 6.🧮 Resistors of 20 Ω, 150 Ω, 68 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  7. 7.🧮 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)?
  8. 8.🧮 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)?
  9. 9.🧮 Resistors of 470 Ω, 47 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 Resistors of 150 Ω, 22 Ω, 10 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  13. 13.🧮 Resistors of 33 Ω, 22 Ω, 100 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 Two resistors in parallel give a total that is … (a) less than either one (b) always zero (c) their sum (d) more than either one
  15. 15.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 A 4 V battery is joined to 6 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 A 1.6 V battery is joined to 8 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  19. 19.🧮 Three equal 30 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.🧮 A 2.5 V battery is joined to 4 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  22. 22.🧮 A 0.8 V battery is joined to 4 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  23. 23.🧮 Resistors of 330 Ω, 470 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  25. 25.🧮 A 100 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)?
  26. 26.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) smaller (c) stay the same (d) bigger
  27. 27.🧮 A 150 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)?
  28. 28.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 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)?
  30. 30.🧮 A 1.5 V battery is joined to 2 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  31. 31.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 Resistors of 10 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 A 3.5 V battery is joined to 5 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  34. 34.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 A 470 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)?
  36. 36.🧮 A 10 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)?
  37. 37.🧮 A 0.5 V battery is joined to 3 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  38. 38.🧮 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)?
  39. 39.🧮 Resistors of 220 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  40. 40.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. 110
  2. 70
  3. 221
  4. 165
  5. 0.2
  6. 306
  7. 522
  8. 303
  9. 527
  10. 100
  11. 100
  12. 215
  13. 175
  14. less than either one
  15. 10
  16. 20
  17. 0.25
  18. 0.1
  19. 10
  20. 565
  21. 0.25
  22. 0.1
  23. 1020
  24. 25
  25. 105
  26. bigger
  27. 385
  28. 5
  29. 495
  30. 0.25
  31. 25
  32. 20
  33. 0.5
  34. 50
  35. 490
  36. 35
  37. 0.1
  38. 130
  39. 230
  40. 500

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