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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 14 · 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.🧮 Resistors of 50 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  2. 2.🧮 A 68 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)?
  3. 3.🧮 Resistors of 68 Ω, 22 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  4. 4.🧮 Adding another resistor in series makes the total resistance … (a) stay the same (b) bigger (c) zero (d) smaller
  5. 5.🧮 A 0.4 V battery is joined to 2 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  6. 6.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 A 33 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)?
  8. 8.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 Resistors of 10 Ω, 330 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 Resistors of 50 Ω, 150 Ω, 470 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  12. 12.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 A 22 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)?
  14. 14.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 Two resistors in parallel give a total that is … (a) less than either one (b) more than either one (c) their sum (d) always zero
  17. 17.🧮 A 220 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)?
  18. 18.🧮 A 3.5 V battery is joined to 5 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  19. 19.🧮 A 1.1 V battery is joined to 6 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  20. 20.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 Resistors of 470 Ω, 20 Ω, 33 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 Resistors of 68 Ω, 33 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 A 47 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)?
  25. 25.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 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)?
  28. 28.🧮 A 22 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)?
  29. 29.🧮 A 2 V battery is joined to 8 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  30. 30.🧮 Resistors of 22 Ω, 330 Ω, 100 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 A 2.5 V battery is joined to 3 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  33. 33.🧮 Resistors of 220 Ω, 10 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 Resistors of 20 Ω, 20 Ω, 33 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 A 3.5 V battery is joined to 2 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  36. 36.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 Resistors of 150 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 A 150 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)?
  39. 39.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  40. 40.🧮 A 330 Ω resistor is joined in series with two equal 220 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?

Answer key

  1. 83
  2. 233
  3. 110
  4. bigger
  5. 0.1
  6. 20
  7. 38
  8. 25
  9. 810
  10. 100
  11. 717
  12. 25
  13. 522
  14. 5
  15. 20
  16. less than either one
  17. 270
  18. 0.5
  19. 0.1
  20. 100
  21. 543
  22. 100
  23. 321
  24. 57
  25. 5
  26. 235
  27. 175
  28. 257
  29. 0.2
  30. 462
  31. 50
  32. 0.5
  33. 298
  34. 141
  35. 0.25
  36. 165
  37. 160
  38. 155
  39. 110
  40. 440

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