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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 432 · 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.🧮 Two resistors in parallel give a total that is … (a) less than either one (b) their sum (c) more than either one (d) always zero
  2. 2.🧮 A 3.2 V battery is joined to 4 Ω and 12 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.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  6. 6.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 Resistors of 20 Ω, 150 Ω, 220 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  8. 8.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 A 6.5 V battery is joined to 3 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  10. 10.🧮 An 18 V battery is joined to 6 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  11. 11.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 Resistors of 10 Ω, 20 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  13. 13.🧮 Resistors of 33 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 Resistors of 470 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  15. 15.🧮 Resistors of 330 Ω, 100 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 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)?
  17. 17.🧮 A 1.2 V battery is joined to 3 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 20 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  19. 19.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 Resistors of 22 Ω, 68 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  21. 21.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 Resistors of 22 Ω, 150 Ω, 50 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 Resistors of 50 Ω, 50 Ω, 50 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 Resistors of 20 Ω, 100 Ω, 20 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 A 0.7 V battery is joined to 4 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  27. 27.🧮 A 20 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)?
  28. 28.🧮 An 8 V battery is joined to 10 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  29. 29.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 A 5.5 V battery is joined to 3 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  31. 31.🧮 A 33 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)?
  32. 32.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 Resistors of 20 Ω, 10 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 A 1.75 V battery is joined to 5 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  37. 37.🧮 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)?
  38. 38.🧮 Resistors of 22 Ω, 50 Ω, 68 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  40. 40.🧮 A 6 V battery is joined to 6 Ω and 6 Ω resistors in series. What current flows (in amperes)? =

Answer key

  1. less than either one
  2. 0.2
  3. bigger
  4. 165
  5. 100
  6. 25
  7. 720
  8. 10
  9. 0.5
  10. 1
  11. 110
  12. 360
  13. 66
  14. 520
  15. 498
  16. 335
  17. 0.2
  18. 340
  19. 100
  20. 240
  21. 25
  22. 322
  23. 50
  24. 250
  25. 162
  26. 0.1
  27. 520
  28. 0.5
  29. 20
  30. 0.5
  31. 53
  32. 20
  33. 25
  34. 250
  35. 10
  36. 0.25
  37. 380
  38. 240
  39. 500
  40. 0.5

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