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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 469 · 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 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 Two resistors in parallel give a total that is … (a) less than either one (b) their sum (c) always zero (d) more than either one
  4. 4.🧮 A 5 V battery is joined to 8 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  5. 5.🧮 A 68 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)?
  6. 6.🧮 A 330 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)?
  7. 7.🧮 Four equal 400 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) stay the same (c) smaller (d) bigger
  9. 9.🧮 A 1.25 V battery is joined to 2 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  10. 10.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 A 1.2 V battery is joined to 2 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  12. 12.🧮 A 9 V battery is joined to 4 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  13. 13.🧮 Resistors of 330 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 A 68 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)?
  15. 15.🧮 A 0.7 V battery is joined to 4 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  16. 16.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 Resistors of 470 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  18. 18.🧮 Resistors of 100 Ω, 100 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 A 5 V battery is joined to 12 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  20. 20.🧮 A 2 V battery is joined to 3 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  21. 21.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 A 33 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 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)?
  24. 24.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  25. 25.🧮 A 470 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)?
  26. 26.🧮 Resistors of 330 Ω, 50 Ω, 47 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 Resistors of 22 Ω, 50 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 Resistors of 47 Ω, 470 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 A 22 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)?
  31. 31.🧮 Resistors of 47 Ω, 68 Ω, 10 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 A 220 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)?
  33. 33.🧮 A 47 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)?
  34. 34.🧮 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)?
  35. 35.🧮 A 3 V battery is joined to 8 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  36. 36.🧮 Resistors of 10 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 Resistors of 20 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 Resistors of 47 Ω, 50 Ω, 220 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 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)?
  40. 40.🧮 Resistors of 150 Ω, 330 Ω, 50 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. 10
  2. 110
  3. less than either one
  4. 0.5
  5. 118
  6. 830
  7. 100
  8. bigger
  9. 0.25
  10. 165
  11. 0.1
  12. 1
  13. 380
  14. 178
  15. 0.1
  16. 500
  17. 620
  18. 222
  19. 0.25
  20. 0.25
  21. 10
  22. 533
  23. 105
  24. 100
  25. 520
  26. 527
  27. 105
  28. 25
  29. 539
  30. 47
  31. 345
  32. 230
  33. 67
  34. 200
  35. 0.25
  36. 60
  37. 240
  38. 364
  39. 385
  40. 680

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