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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 430 · 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 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 Resistors of 330 Ω, 22 Ω, 33 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  3. 3.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  4. 4.🧮 Adding another resistor in series makes the total resistance … (a) stay the same (b) smaller (c) zero (d) bigger
  5. 5.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  6. 6.🧮 Two resistors in parallel give a total that is … (a) more than either one (b) their sum (c) less than either one (d) always zero
  7. 7.🧮 A 150 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)?
  8. 8.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 Resistors of 68 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 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)?
  11. 11.🧮 A 10 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 0.7 V battery is joined to 2 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  13. 13.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 A 330 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)?
  16. 16.🧮 An 8 V battery is joined to 3 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  17. 17.🧮 A 3.5 V battery is joined to 6 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 Resistors of 330 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 Resistors of 330 Ω, 10 Ω, 20 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  20. 20.🧮 A 0.8 V battery is joined to 6 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  21. 21.🧮 Resistors of 330 Ω, 50 Ω, 150 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 Resistors of 33 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 Resistors of 50 Ω, 47 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 A 15 V battery is joined to 12 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  27. 27.🧮 A 2.5 V battery is joined to 2 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  28. 28.🧮 Resistors of 10 Ω, 20 Ω, 47 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  29. 29.🧮 Resistors of 47 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 Resistors of 20 Ω, 50 Ω, 47 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 A 16 V battery is joined to 6 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  34. 34.🧮 Resistors of 100 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 A 4 V battery is joined to 8 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  37. 37.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 Resistors of 220 Ω, 20 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 A 3.5 V battery is joined to 4 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  40. 40.🧮 A 20 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)?

Answer key

  1. 165
  2. 435
  3. 5
  4. bigger
  5. 10
  6. less than either one
  7. 175
  8. 10
  9. 101
  10. 200
  11. 15
  12. 0.1
  13. 50
  14. 110
  15. 430
  16. 1
  17. 0.25
  18. 352
  19. 428
  20. 0.1
  21. 598
  22. 53
  23. 5
  24. 119
  25. 25
  26. 1
  27. 0.5
  28. 124
  29. 377
  30. 20
  31. 167
  32. 100
  33. 1
  34. 570
  35. 25
  36. 0.2
  37. 500
  38. 250
  39. 0.25
  40. 45

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