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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 285 · 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.🧮 A 1.1 V battery is joined to 5 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  2. 2.🧮 A 47 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)?
  3. 3.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  4. 4.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) stay the same (c) bigger (d) smaller
  6. 6.🧮 Resistors of 100 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  7. 7.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 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)?
  10. 10.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 Resistors of 20 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  12. 12.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 Two resistors in parallel give a total that is … (a) their sum (b) more than either one (c) always zero (d) less than either one
  14. 14.🧮 A 2 V battery is joined to 4 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  15. 15.🧮 A 9 V battery is joined to 4 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  16. 16.🧮 A 50 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)?
  17. 17.🧮 Resistors of 68 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  18. 18.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  19. 19.🧮 A 150 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)?
  20. 20.🧮 Resistors of 22 Ω, 47 Ω, 33 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  21. 21.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 A 33 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)?
  25. 25.🧮 A 50 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)?
  26. 26.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  28. 28.🧮 A 33 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)?
  29. 29.🧮 A 20 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)?
  30. 30.🧮 Resistors of 470 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 Resistors of 20 Ω, 47 Ω, 20 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 A 1.5 V battery is joined to 2 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  34. 34.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 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)?
  36. 36.🧮 A 22 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)?
  37. 37.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 A 1.4 V battery is joined to 12 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  39. 39.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  40. 40.🧮 Resistors of 50 Ω, 50 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. 0.1
  2. 97
  3. 165
  4. 500
  5. bigger
  6. 150
  7. 25
  8. 50
  9. 30
  10. 10
  11. 170
  12. 20
  13. less than either one
  14. 0.25
  15. 1
  16. 100
  17. 115
  18. 20
  19. 315
  20. 152
  21. 5
  22. 50
  23. 25
  24. 53
  25. 60
  26. 100
  27. 5
  28. 43
  29. 70
  30. 492
  31. 155
  32. 20
  33. 0.25
  34. 110
  35. 522
  36. 187
  37. 5
  38. 0.1
  39. 100
  40. 147

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