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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 81 · 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.🧮 A 47 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)?
  2. 2.🧮 Resistors of 47 Ω, 470 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  3. 3.🧮 Resistors of 22 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  4. 4.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 Resistors of 330 Ω, 33 Ω, 470 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  6. 6.🧮 A 33 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)?
  7. 7.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 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)?
  12. 12.🧮 An 11 V battery is joined to 3 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  13. 13.🧮 A 220 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)?
  14. 14.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 Two resistors in parallel give a total that is … (a) always zero (b) less than either one (c) more than either one (d) their sum
  16. 16.🧮 Adding another resistor in series makes the total resistance … (a) stay the same (b) bigger (c) zero (d) smaller
  17. 17.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 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)?
  19. 19.🧮 A 1.8 V battery is joined to 3 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  20. 20.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 Resistors of 20 Ω, 470 Ω, 470 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 A 3.5 V battery is joined to 5 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  23. 23.🧮 A 47 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.🧮 A 47 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)?
  25. 25.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 A 4.25 V battery is joined to 12 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  27. 27.🧮 Resistors of 47 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 Resistors of 50 Ω, 50 Ω, 220 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  29. 29.🧮 Resistors of 33 Ω, 68 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 Resistors of 68 Ω, 10 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 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)?
  33. 33.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 Resistors of 220 Ω, 47 Ω, 68 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 A 100 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)?
  37. 37.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 Resistors of 330 Ω, 22 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 A 50 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)?
  40. 40.🧮 Resistors of 20 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. 547
  2. 667
  3. 32
  4. 20
  5. 1303
  6. 43
  7. 100
  8. 165
  9. 10
  10. 50
  11. 255
  12. 1
  13. 320
  14. 10
  15. less than either one
  16. bigger
  17. 100
  18. 175
  19. 0.2
  20. 25
  21. 993
  22. 0.5
  23. 67
  24. 212
  25. 50
  26. 0.25
  27. 69
  28. 790
  29. 123
  30. 235
  31. 146
  32. 200
  33. 20
  34. 5
  35. 368
  36. 120
  37. 25
  38. 372
  39. 55
  40. 170

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