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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 465 · 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, 220 Ω, 330 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  2. 2.🧮 A 1.4 V battery is joined to 12 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  3. 3.🧮 Adding another resistor in series makes the total resistance … (a) smaller (b) zero (c) bigger (d) stay the same
  4. 4.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 A 33 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)?
  6. 6.🧮 A 7.5 V battery is joined to 5 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  7. 7.🧮 A 470 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)?
  8. 8.🧮 A 7.5 V battery is joined to 10 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  9. 9.🧮 Resistors of 330 Ω, 470 Ω, 22 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 Resistors of 10 Ω, 22 Ω, 33 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  13. 13.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 Two resistors in parallel give a total that is … (a) less than either one (b) always zero (c) more than either one (d) their sum
  15. 15.🧮 A 33 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)?
  16. 16.🧮 Resistors of 220 Ω, 22 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  19. 19.🧮 Resistors of 68 Ω, 22 Ω, 68 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  20. 20.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 A 47 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)?
  22. 22.🧮 An 8.5 V battery is joined to 5 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  23. 23.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 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)?
  25. 25.🧮 A 1.8 V battery is joined to 5 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  26. 26.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 A 4 V battery is joined to 3 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  28. 28.🧮 A 50 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)?
  29. 29.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 Resistors of 20 Ω, 470 Ω, 220 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 Resistors of 47 Ω, 50 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 A 150 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)?
  34. 34.🧮 A 10 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)?
  35. 35.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 A 330 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)?
  38. 38.🧮 A 5.5 V battery is joined to 5 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  39. 39.🧮 A 6.5 V battery is joined to 8 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  40. 40.🧮 Resistors of 22 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. 670
  2. 0.1
  3. bigger
  4. 50
  5. 268
  6. 0.5
  7. 475
  8. 0.5
  9. 922
  10. 110
  11. 25
  12. 112
  13. 10
  14. less than either one
  15. 83
  16. 275
  17. 10
  18. 100
  19. 226
  20. 165
  21. 67
  22. 0.5
  23. 5
  24. 73
  25. 0.2
  26. 20
  27. 0.5
  28. 60
  29. 235
  30. 860
  31. 117
  32. 5
  33. 385
  34. 60
  35. 25
  36. 20
  37. 335
  38. 0.5
  39. 0.5
  40. 90

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