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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 44 · 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 10 Ω, 68 Ω, 150 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  2. 2.🧮 Resistors of 68 Ω, 220 Ω and 22 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.🧮 A 3.5 V battery is joined to 3 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  5. 5.🧮 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)?
  6. 6.🧮 Resistors of 22 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  7. 7.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 A 7 V battery is joined to 4 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  9. 9.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) bigger (c) smaller (d) stay the same
  10. 10.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 Resistors of 33 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  13. 13.🧮 A 10 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)?
  14. 14.🧮 A 22 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)?
  15. 15.🧮 A 470 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)?
  16. 16.🧮 Resistors of 470 Ω, 22 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 A 2.5 V battery is joined to 4 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  19. 19.🧮 A 220 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.🧮 Two resistors in parallel give a total that is … (a) more than either one (b) their sum (c) always zero (d) less than either one
  21. 21.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 Resistors of 20 Ω, 470 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 A 22 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)?
  26. 26.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  28. 28.🧮 A 10 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)?
  29. 29.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 Resistors of 330 Ω, 33 Ω, 150 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 A 0.8 V battery is joined to 3 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  32. 32.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 Resistors of 47 Ω, 220 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 A 470 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)?
  36. 36.🧮 A 5 V battery is joined to 2 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  37. 37.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 Resistors of 20 Ω, 20 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  40. 40.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. 698
  2. 310
  3. 10
  4. 0.5
  5. 53
  6. 44
  7. 100
  8. 0.5
  9. bigger
  10. 110
  11. 165
  12. 66
  13. 120
  14. 257
  15. 970
  16. 542
  17. 0.25
  18. 25
  19. 385
  20. less than either one
  21. 20
  22. 100
  23. 5
  24. 590
  25. 132
  26. 20
  27. 100
  28. 510
  29. 50
  30. 546
  31. 0.1
  32. 10
  33. 417
  34. 235
  35. 495
  36. 1
  37. 10
  38. 10
  39. 87
  40. 20

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