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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 110 · 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 470 Ω, 68 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  2. 2.🧮 Resistors of 220 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  3. 3.🧮 Adding another resistor in series makes the total resistance … (a) smaller (b) bigger (c) zero (d) stay the same
  4. 4.🧮 Two resistors in parallel give a total that is … (a) more than either one (b) less than either one (c) their sum (d) always zero
  5. 5.🧮 A 47 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)?
  6. 6.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 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)?
  8. 8.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 A 100 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)?
  10. 10.🧮 A 4 V battery is joined to 4 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  11. 11.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 A 47 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)?
  14. 14.🧮 Resistors of 10 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  15. 15.🧮 A 2.5 V battery is joined to 2 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  16. 16.🧮 A 0.9 V battery is joined to 6 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  17. 17.🧮 Resistors of 330 Ω, 10 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  18. 18.🧮 A 3.75 V battery is joined to 12 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  19. 19.🧮 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)?
  20. 20.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 Resistors of 470 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 Resistors of 220 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 Resistors of 20 Ω, 22 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 Resistors of 100 Ω, 47 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 An 11 V battery is joined to 10 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  29. 29.🧮 A 20 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)?
  30. 30.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 A 100 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)?
  32. 32.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 Resistors of 330 Ω, 33 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 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)?
  38. 38.🧮 A 330 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)?
  39. 39.🧮 A 150 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)?
  40. 40.🧮 A 3 V battery is joined to 3 Ω and 12 Ω resistors in series. What current flows (in amperes)? =

Answer key

  1. 638
  2. 270
  3. bigger
  4. less than either one
  5. 72
  6. 20
  7. 20
  8. 50
  9. 125
  10. 0.25
  11. 10
  12. 5
  13. 57
  14. 480
  15. 0.25
  16. 0.1
  17. 362
  18. 0.25
  19. 533
  20. 25
  21. 10
  22. 800
  23. 165
  24. 288
  25. 25
  26. 89
  27. 617
  28. 0.5
  29. 255
  30. 25
  31. 110
  32. 20
  33. 110
  34. 463
  35. 5
  36. 25
  37. 315
  38. 350
  39. 250
  40. 0.2

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