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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 374 · 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 1.6 V battery is joined to 5 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  2. 2.🧮 Adding another resistor in series makes the total resistance … (a) bigger (b) zero (c) smaller (d) stay the same
  3. 3.🧮 Two resistors in parallel give a total that is … (a) less than either one (b) always zero (c) their sum (d) more than either one
  4. 4.🧮 Three equal 15 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 10 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  6. 6.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 Resistors of 330 Ω, 50 Ω, 22 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  9. 9.🧮 Resistors of 330 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 Resistors of 50 Ω, 68 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 Resistors of 33 Ω, 100 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 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)?
  15. 15.🧮 A 47 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)?
  16. 16.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 Resistors of 33 Ω, 47 Ω, 47 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  18. 18.🧮 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)?
  19. 19.🧮 Resistors of 330 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  20. 20.🧮 A 3.5 V battery is joined to 4 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  21. 21.🧮 Resistors of 20 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 A 3.5 V battery is joined to 5 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  23. 23.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  25. 25.🧮 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)?
  26. 26.🧮 A 1.1 V battery is joined to 5 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  27. 27.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  28. 28.🧮 A 20 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)?
  29. 29.🧮 Resistors of 47 Ω, 47 Ω, 150 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 A 14 V battery is joined to 2 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  31. 31.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 A 0.8 V battery is joined to 4 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  33. 33.🧮 A 220 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)?
  34. 34.🧮 Resistors of 10 Ω, 10 Ω, 10 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 A 0.7 V battery is joined to 4 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  36. 36.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 A 5 V battery is joined to 3 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  39. 39.🧮 Resistors of 47 Ω, 20 Ω, 220 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  40. 40.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. 0.2
  2. bigger
  3. less than either one
  4. 5
  5. 38
  6. 500
  7. 10
  8. 622
  9. 352
  10. 140
  11. 50
  12. 235
  13. 180
  14. 522
  15. 282
  16. 10
  17. 147
  18. 58
  19. 430
  20. 0.25
  21. 53
  22. 0.5
  23. 110
  24. 10
  25. 73
  26. 0.1
  27. 20
  28. 40
  29. 714
  30. 1
  31. 50
  32. 0.1
  33. 330
  34. 180
  35. 0.1
  36. 25
  37. 20
  38. 1
  39. 297
  40. 100

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