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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 836 · 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.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) smaller (c) stay the same (d) bigger
  2. 2.🧮 Resistors of 22 Ω, 470 Ω, 20 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  3. 3.🧮 A 68 Ω resistor is joined in series with two equal 10 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  4. 4.🧮 A 100 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)?
  5. 5.🧮 A 5.5 V battery is joined to 8 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  6. 6.🧮 Resistors of 22 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  7. 7.🧮 A 10 V battery is joined to 5 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  8. 8.🧮 Two resistors in parallel give a total that is … (a) always zero (b) less than either one (c) their sum (d) more than either one
  9. 9.🧮 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)?
  10. 10.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 Resistors of 150 Ω, 20 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  12. 12.🧮 Resistors of 220 Ω, 100 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  13. 13.🧮 A 330 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)?
  14. 14.🧮 A 1 V battery is joined to 8 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  15. 15.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 Resistors of 10 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  19. 19.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 Resistors of 47 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  21. 21.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 A 5.5 V battery is joined to 12 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  23. 23.🧮 Resistors of 68 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 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)?
  25. 25.🧮 Two equal 330 Ω resistors are joined in parallel. 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.🧮 A 47 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)?
  28. 28.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 Resistors of 68 Ω, 47 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 A 3.6 V battery is joined to 12 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  32. 32.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 Resistors of 20 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 A 1.2 V battery is joined to 3 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  36. 36.🧮 Resistors of 330 Ω, 20 Ω, 10 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 Resistors of 47 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 A 330 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 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  40. 40.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. bigger
  2. 842
  3. 73
  4. 265
  5. 0.5
  6. 172
  7. 1
  8. less than either one
  9. 568
  10. 5
  11. 180
  12. 340
  13. 380
  14. 0.1
  15. 500
  16. 60
  17. 10
  18. 10
  19. 20
  20. 94
  21. 100
  22. 0.25
  23. 88
  24. 100
  25. 165
  26. 100
  27. 147
  28. 100
  29. 125
  30. 20
  31. 0.2
  32. 5
  33. 5
  34. 53
  35. 0.2
  36. 510
  37. 197
  38. 340
  39. 235
  40. 5

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