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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 295 · 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.🧮 A 0.8 V battery is joined to 5 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  2. 2.🧮 A 1 V battery is joined to 4 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  3. 3.🧮 A 3.5 V battery is joined to 4 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  4. 4.🧮 Two resistors in parallel give a total that is … (a) their sum (b) always zero (c) more than either one (d) less than either one
  5. 5.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  6. 6.🧮 Resistors of 47 Ω, 22 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  7. 7.🧮 An 8 V battery is joined to 10 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  8. 8.🧮 A 50 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)?
  9. 9.🧮 Resistors of 330 Ω, 22 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 Resistors of 50 Ω, 100 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 A 47 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)?
  12. 12.🧮 Resistors of 33 Ω, 100 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  13. 13.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) smaller (c) stay the same (d) bigger
  14. 14.🧮 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)?
  15. 15.🧮 A 1.6 V battery is joined to 3 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  16. 16.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 An 11 V battery is joined to 8 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 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)?
  19. 19.🧮 A 3.5 V battery is joined to 5 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  20. 20.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 Resistors of 10 Ω, 33 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 Resistors of 10 Ω, 47 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 Resistors of 10 Ω, 68 Ω, 50 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 A 2.2 V battery is joined to 8 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  25. 25.🧮 A 20 V battery is joined to 12 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  26. 26.🧮 A 47 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)?
  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.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 A 3.25 V battery is joined to 8 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  30. 30.🧮 A 20 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)?
  31. 31.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 Resistors of 20 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 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)?
  35. 35.🧮 A 1.1 V battery is joined to 3 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  36. 36.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 A 22 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)?
  38. 38.🧮 A 1.3 V battery is joined to 5 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  39. 39.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  40. 40.🧮 A 1.5 V battery is joined to 12 Ω and 3 Ω resistors in series. What current flows (in amperes)? =

Answer key

  1. 0.1
  2. 0.1
  3. 0.5
  4. less than either one
  5. 20
  6. 539
  7. 0.5
  8. 285
  9. 399
  10. 620
  11. 57
  12. 143
  13. bigger
  14. 60
  15. 0.2
  16. 25
  17. 1
  18. 335
  19. 0.5
  20. 50
  21. 63
  22. 77
  23. 178
  24. 0.2
  25. 1
  26. 97
  27. 147
  28. 100
  29. 0.25
  30. 25
  31. 110
  32. 67
  33. 500
  34. 510
  35. 0.1
  36. 10
  37. 47
  38. 0.1
  39. 10
  40. 0.1

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