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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 763 · 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.🧮 Resistors of 50 Ω, 330 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  2. 2.🧮 Resistors of 22 Ω, 100 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  3. 3.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  4. 4.🧮 Resistors of 220 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  5. 5.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  6. 6.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 Two resistors in parallel give a total that is … (a) always zero (b) more than either one (c) their sum (d) less than either one
  8. 8.🧮 A 47 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)?
  9. 9.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 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)?
  14. 14.🧮 A 4 V battery is joined to 5 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  15. 15.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 A 2.8 V battery is joined to 6 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  17. 17.🧮 A 3.5 V battery is joined to 3 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  19. 19.🧮 A 20 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)?
  20. 20.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) stay the same (c) bigger (d) smaller
  22. 22.🧮 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)?
  23. 23.🧮 A 4.25 V battery is joined to 12 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  24. 24.🧮 An 11 V battery is joined to 12 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  25. 25.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 Resistors of 50 Ω, 68 Ω, 47 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 Resistors of 150 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  29. 29.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 A 2 V battery is joined to 12 Ω and 8 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, 470 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 A 2.25 V battery is joined to 4 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  34. 34.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 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)?
  37. 37.🧮 A 1.2 V battery is joined to 3 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  38. 38.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 A 50 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)?
  40. 40.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. 448
  2. 142
  3. 10
  4. 267
  5. 110
  6. 20
  7. less than either one
  8. 52
  9. 100
  10. 10
  11. 100
  12. 10
  13. 185
  14. 0.5
  15. 25
  16. 0.2
  17. 0.5
  18. 100
  19. 30
  20. 10
  21. bigger
  22. 335
  23. 0.25
  24. 0.5
  25. 20
  26. 25
  27. 185
  28. 170
  29. 5
  30. 0.1
  31. 25
  32. 530
  33. 0.25
  34. 5
  35. 100
  36. 178
  37. 0.2
  38. 500
  39. 75
  40. 50

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