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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 346 · 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.🧮 Two resistors in parallel give a total that is … (a) always zero (b) their sum (c) less than either one (d) more than either one
  2. 2.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 A 100 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)?
  4. 4.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) bigger (c) stay the same (d) smaller
  5. 5.🧮 Resistors of 20 Ω, 50 Ω, 470 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  6. 6.🧮 A 68 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)?
  7. 7.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 Resistors of 47 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  9. 9.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 Resistors of 470 Ω, 330 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 A 33 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)?
  12. 12.🧮 Resistors of 20 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  13. 13.🧮 Resistors of 68 Ω, 68 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 Resistors of 47 Ω, 470 Ω, 20 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 Resistors of 20 Ω, 330 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  18. 18.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  19. 19.🧮 An 8 V battery is joined to 6 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  20. 20.🧮 Resistors of 220 Ω, 220 Ω, 68 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  21. 21.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 Resistors of 10 Ω, 10 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 Resistors of 20 Ω, 470 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 A 100 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)?
  25. 25.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 Resistors of 50 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 A 12 V battery is joined to 6 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  28. 28.🧮 Resistors of 150 Ω, 10 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  29. 29.🧮 A 1.8 V battery is joined to 6 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  30. 30.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 Resistors of 330 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 A 6 V battery is joined to 6 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  34. 34.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 Resistors of 100 Ω, 50 Ω, 330 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 A 470 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)?
  37. 37.🧮 Resistors of 47 Ω, 50 Ω, 100 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 A 22 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.🧮 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)?
  40. 40.🧮 A 4 V battery is joined to 6 Ω and 2 Ω resistors in series. What current flows (in amperes)? =

Answer key

  1. less than either one
  2. 50
  3. 600
  4. bigger
  5. 550
  6. 568
  7. 5
  8. 67
  9. 25
  10. 820
  11. 58
  12. 490
  13. 183
  14. 5
  15. 605
  16. 110
  17. 370
  18. 10
  19. 0.5
  20. 658
  21. 20
  22. 240
  23. 510
  24. 210
  25. 500
  26. 200
  27. 1
  28. 310
  29. 0.1
  30. 50
  31. 20
  32. 340
  33. 0.5
  34. 100
  35. 700
  36. 490
  37. 265
  38. 32
  39. 350
  40. 0.5

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