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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 765 · 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 100 Ω, 50 Ω, 22 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  2. 2.🧮 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
  3. 3.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  4. 4.🧮 A 10 V battery is joined to 4 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  5. 5.🧮 Adding another resistor in series makes the total resistance … (a) smaller (b) bigger (c) stay the same (d) zero
  6. 6.🧮 Four equal 400 Ω resistors are joined in parallel. 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.🧮 A 1.4 V battery is joined to 10 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  9. 9.🧮 A 1.6 V battery is joined to 6 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  10. 10.🧮 Resistors of 330 Ω, 100 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 A 68 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)?
  13. 13.🧮 Resistors of 47 Ω, 22 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 Resistors of 470 Ω, 470 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  15. 15.🧮 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)?
  16. 16.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 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)?
  18. 18.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  19. 19.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 A 1.8 V battery is joined to 6 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  21. 21.🧮 A 3.75 V battery is joined to 12 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  22. 22.🧮 Two equal 220 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, 100 Ω, 100 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 Resistors of 47 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 Resistors of 330 Ω, 50 Ω, 22 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 Resistors of 330 Ω, 47 Ω, 220 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 Resistors of 20 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 Resistors of 22 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 Resistors of 150 Ω, 470 Ω, 20 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 A 7 V battery is joined to 6 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  37. 37.🧮 Resistors of 50 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 A 150 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)?
  39. 39.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  40. 40.🧮 A 3.5 V battery is joined to 2 Ω and 5 Ω resistors in series. What current flows (in amperes)? =

Answer key

  1. 182
  2. less than either one
  3. 100
  4. 1
  5. bigger
  6. 100
  7. 25
  8. 0.1
  9. 0.1
  10. 498
  11. 10
  12. 88
  13. 91
  14. 960
  15. 533
  16. 50
  17. 522
  18. 235
  19. 20
  20. 0.2
  21. 0.25
  22. 110
  23. 5
  24. 690
  25. 165
  26. 94
  27. 732
  28. 10
  29. 747
  30. 490
  31. 44
  32. 100
  33. 20
  34. 662
  35. 5
  36. 0.5
  37. 520
  38. 160
  39. 5
  40. 0.5

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