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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 871 · 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 220 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)?
  2. 2.🧮 A 150 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)?
  3. 3.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  4. 4.🧮 Resistors of 470 Ω, 470 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  5. 5.🧮 A 4 V battery is joined to 8 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  6. 6.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 A 3 V battery is joined to 12 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  8. 8.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 Resistors of 330 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 A 4 V battery is joined to 10 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  11. 11.🧮 A 3 V battery is joined to 6 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  12. 12.🧮 A 4.4 V battery is joined to 10 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  13. 13.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 Adding another resistor in series makes the total resistance … (a) stay the same (b) zero (c) smaller (d) bigger
  16. 16.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 A 1.8 V battery is joined to 6 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  19. 19.🧮 An 18 V battery is joined to 10 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  20. 20.🧮 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)?
  21. 21.🧮 A 20 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)?
  22. 22.🧮 A 2.5 V battery is joined to 6 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  23. 23.🧮 A 100 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)?
  24. 24.🧮 A 470 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.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 A 10 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)?
  27. 27.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  28. 28.🧮 A 14 V battery is joined to 12 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  29. 29.🧮 Two resistors in parallel give a total that is … (a) always zero (b) their sum (c) more than either one (d) less than either one
  30. 30.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 Resistors of 10 Ω, 330 Ω, 470 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 A 5.5 V battery is joined to 5 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  35. 35.🧮 Resistors of 68 Ω, 68 Ω, 470 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 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)?
  37. 37.🧮 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)?
  38. 38.🧮 Resistors of 20 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 A 1.6 V battery is joined to 12 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  40. 40.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. 720
  2. 250
  3. 100
  4. 950
  5. 0.25
  6. 10
  7. 0.2
  8. 25
  9. 550
  10. 0.2
  11. 0.25
  12. 0.2
  13. 110
  14. 10
  15. bigger
  16. 10
  17. 25
  18. 0.2
  19. 1
  20. 200
  21. 255
  22. 0.25
  23. 110
  24. 635
  25. 165
  26. 20
  27. 5
  28. 1
  29. less than either one
  30. 235
  31. 20
  32. 50
  33. 1030
  34. 0.5
  35. 626
  36. 212
  37. 495
  38. 240
  39. 0.1
  40. 5

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