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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 481 · 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.

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  1. 1.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) bigger (c) stay the same (d) smaller
  2. 2.🧮 A 330 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)?
  3. 3.🧮 Two equal 330 Ω resistors are joined in parallel. 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.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  6. 6.🧮 A 14 V battery is joined to 8 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  7. 7.🧮 A 2.8 V battery is joined to 4 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  8. 8.🧮 A 100 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.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 Resistors of 150 Ω, 47 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 Two equal 50 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 20 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  15. 15.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 A 7.5 V battery is joined to 5 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  17. 17.🧮 Resistors of 68 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  18. 18.🧮 A 10 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)?
  19. 19.🧮 A 68 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)?
  20. 20.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 A 7 V battery is joined to 6 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  22. 22.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 Resistors of 20 Ω, 22 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 A 5.5 V battery is joined to 3 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  27. 27.🧮 Resistors of 330 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 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)?
  29. 29.🧮 Resistors of 33 Ω, 220 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 Resistors of 10 Ω, 10 Ω, 10 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 A 1.6 V battery is joined to 12 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, 10 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 A 1 V battery is joined to 3 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  35. 35.🧮 A 1.75 V battery is joined to 3 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  36. 36.🧮 Two resistors in parallel give a total that is … (a) always zero (b) their sum (c) less than either one (d) more than either one
  37. 37.🧮 Resistors of 10 Ω, 330 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 A 1.5 V battery is joined to 3 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  39. 39.🧮 Five equal 25 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 330 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?

Answer key

  1. bigger
  2. 355
  3. 165
  4. 20
  5. 5
  6. 1
  7. 0.2
  8. 335
  9. 500
  10. 247
  11. 10
  12. 10
  13. 25
  14. 20
  15. 20
  16. 0.5
  17. 78
  18. 110
  19. 568
  20. 20
  21. 0.5
  22. 5
  23. 50
  24. 110
  25. 100
  26. 0.5
  27. 398
  28. 495
  29. 403
  30. 50
  31. 0.1
  32. 100
  33. 130
  34. 0.2
  35. 0.25
  36. less than either one
  37. 362
  38. 0.1
  39. 5
  40. 185

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