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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 837 · 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 1.5 V battery is joined to 4 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  2. 2.🧮 Resistors of 20 Ω, 330 Ω, 47 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  3. 3.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  4. 4.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  6. 6.🧮 A 4.4 V battery is joined to 10 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  7. 7.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 A 330 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)?
  9. 9.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 Adding another resistor in series makes the total resistance … (a) stay the same (b) zero (c) bigger (d) smaller
  11. 11.🧮 A 100 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)?
  12. 12.🧮 A 4.5 V battery is joined to 10 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  13. 13.🧮 Two resistors in parallel give a total that is … (a) more than either one (b) less than either one (c) their sum (d) always zero
  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.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 A 47 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)?
  17. 17.🧮 A 1.8 V battery is joined to 10 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  19. 19.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 A 15 V battery is joined to 10 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  22. 22.🧮 Resistors of 150 Ω, 20 Ω, 47 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 A 330 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)?
  24. 24.🧮 A 47 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)?
  25. 25.🧮 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)?
  26. 26.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  28. 28.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 A 3 V battery is joined to 4 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  30. 30.🧮 A 2.75 V battery is joined to 8 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  31. 31.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 Resistors of 220 Ω, 47 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 Resistors of 22 Ω, 47 Ω, 68 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 A 12 V battery is joined to 2 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  35. 35.🧮 A 100 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)?
  36. 36.🧮 A 330 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)?
  37. 37.🧮 A 7.5 V battery is joined to 12 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  38. 38.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 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)?
  40. 40.🧮 A 2.2 V battery is joined to 10 Ω and 12 Ω resistors in series. What current flows (in amperes)? =

Answer key

  1. 0.25
  2. 867
  3. 5
  4. 25
  5. 10
  6. 0.2
  7. 25
  8. 440
  9. 20
  10. bigger
  11. 105
  12. 0.25
  13. less than either one
  14. 60
  15. 5
  16. 72
  17. 0.1
  18. 100
  19. 5
  20. 50
  21. 1
  22. 267
  23. 830
  24. 212
  25. 67
  26. 20
  27. 100
  28. 25
  29. 0.5
  30. 0.25
  31. 50
  32. 289
  33. 287
  34. 1
  35. 200
  36. 495
  37. 0.5
  38. 20
  39. 380
  40. 0.1

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