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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 821 · 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.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 Adding another resistor in series makes the total resistance … (a) stay the same (b) bigger (c) zero (d) smaller
  3. 3.🧮 A 20 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)?
  4. 4.🧮 Two resistors in parallel give a total that is … (a) more than either one (b) always zero (c) less than either one (d) their sum
  5. 5.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  6. 6.🧮 A 2 V battery is joined to 2 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  7. 7.🧮 An 18 V battery is joined to 6 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  8. 8.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 A 4.25 V battery is joined to 12 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  11. 11.🧮 Resistors of 68 Ω, 50 Ω, 20 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  12. 12.🧮 Resistors of 33 Ω, 220 Ω, 220 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  13. 13.🧮 A 1 V battery is joined to 2 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  14. 14.🧮 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)?
  15. 15.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 Resistors of 20 Ω, 47 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 A 1 V battery is joined to 8 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  20. 20.🧮 Resistors of 150 Ω, 470 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  21. 21.🧮 A 5 V battery is joined to 12 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  22. 22.🧮 A 7 V battery is joined to 4 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  23. 23.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 A 1.4 V battery is joined to 5 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  25. 25.🧮 Resistors of 50 Ω, 50 Ω, 20 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 Resistors of 47 Ω, 68 Ω, 470 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 Resistors of 470 Ω, 22 Ω, 330 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 Resistors of 50 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  29. 29.🧮 Resistors of 10 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 A 3.2 V battery is joined to 6 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  33. 33.🧮 A 4.5 V battery is joined to 8 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  34. 34.🧮 A 10 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)?
  35. 35.🧮 Resistors of 22 Ω, 50 Ω, 470 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  40. 40.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. 50
  2. bigger
  3. 25
  4. less than either one
  5. 165
  6. 0.2
  7. 1
  8. 20
  9. 20
  10. 0.25
  11. 160
  12. 693
  13. 0.2
  14. 255
  15. 100
  16. 5
  17. 235
  18. 397
  19. 0.1
  20. 653
  21. 0.25
  22. 0.5
  23. 10
  24. 0.2
  25. 188
  26. 685
  27. 922
  28. 270
  29. 60
  30. 110
  31. 5
  32. 0.2
  33. 0.25
  34. 175
  35. 692
  36. 25
  37. 500
  38. 25
  39. 50
  40. 5

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