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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 71 · 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.🧮 Adding another resistor in series makes the total resistance … (a) stay the same (b) bigger (c) smaller (d) zero
  2. 2.🧮 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)?
  3. 3.🧮 Resistors of 50 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  4. 4.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 Two equal 40 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) always zero (c) less than either one (d) their sum
  7. 7.🧮 Resistors of 100 Ω, 68 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  8. 8.🧮 Resistors of 47 Ω, 20 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  9. 9.🧮 Resistors of 330 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 Resistors of 330 Ω, 20 Ω, 47 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 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)?
  13. 13.🧮 Resistors of 220 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 A 22 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)?
  16. 16.🧮 A 2.25 V battery is joined to 3 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  17. 17.🧮 A 150 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)?
  18. 18.🧮 Resistors of 10 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 A 50 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)?
  23. 23.🧮 Resistors of 68 Ω, 68 Ω, 68 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 A 5.5 V battery is joined to 10 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  25. 25.🧮 Resistors of 33 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 Resistors of 22 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 Resistors of 50 Ω, 50 Ω, 20 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 Resistors of 33 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  29. 29.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 A 100 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)?
  32. 32.🧮 Resistors of 470 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 A 3 V battery is joined to 5 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  35. 35.🧮 A 1 V battery is joined to 5 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  36. 36.🧮 A 4 V battery is joined to 5 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  37. 37.🧮 Resistors of 330 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 Resistors of 47 Ω, 22 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  40. 40.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. bigger
  2. 20
  3. 72
  4. 235
  5. 20
  6. less than either one
  7. 201
  8. 77
  9. 352
  10. 430
  11. 5
  12. 240
  13. 370
  14. 100
  15. 42
  16. 0.25
  17. 170
  18. 43
  19. 25
  20. 10
  21. 50
  22. 75
  23. 254
  24. 0.25
  25. 43
  26. 42
  27. 140
  28. 253
  29. 25
  30. 100
  31. 105
  32. 490
  33. 10
  34. 0.2
  35. 0.1
  36. 0.5
  37. 800
  38. 119
  39. 50
  40. 5

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