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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 483 · 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.

NameDateTime takenScore ___ / 40
  1. 1.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 Two equal 10 Ω resistors are joined in parallel. 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.🧮 A 3.6 V battery is joined to 6 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  5. 5.🧮 A 22 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.🧮 A 5 V battery is joined to 8 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  7. 7.🧮 A 330 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)?
  8. 8.🧮 Two resistors in parallel give a total that is … (a) more than either one (b) always zero (c) their sum (d) less than either one
  9. 9.🧮 Resistors of 10 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 Adding another resistor in series makes the total resistance … (a) smaller (b) zero (c) bigger (d) stay the same
  11. 11.🧮 A 33 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)?
  12. 12.🧮 Resistors of 470 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  13. 13.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 A 3.5 V battery is joined to 4 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  15. 15.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 A 1.6 V battery is joined to 5 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  17. 17.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  19. 19.🧮 A 4.25 V battery is joined to 12 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  20. 20.🧮 Resistors of 47 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  21. 21.🧮 Resistors of 20 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 A 3.2 V battery is joined to 10 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  23. 23.🧮 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)?
  24. 24.🧮 Resistors of 20 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 Resistors of 470 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 A 150 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)?
  28. 28.🧮 A 2.25 V battery is joined to 4 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  29. 29.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 Resistors of 47 Ω, 150 Ω, 330 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 A 220 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)?
  33. 33.🧮 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)?
  34. 34.🧮 Resistors of 470 Ω, 22 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 A 20 V battery is joined to 12 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  36. 36.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 Resistors of 10 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 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)?
  40. 40.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. 100
  2. 5
  3. 100
  4. 0.2
  5. 27
  6. 0.5
  7. 350
  8. less than either one
  9. 20
  10. bigger
  11. 533
  12. 690
  13. 20
  14. 0.5
  15. 20
  16. 0.2
  17. 235
  18. 50
  19. 0.25
  20. 115
  21. 67
  22. 0.2
  23. 53
  24. 120
  25. 570
  26. 165
  27. 200
  28. 0.25
  29. 50
  30. 547
  31. 5
  32. 240
  33. 635
  34. 514
  35. 1
  36. 20
  37. 43
  38. 100
  39. 20
  40. 10

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