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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 326 · 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 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 A 22 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)?
  3. 3.🧮 A 10 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)?
  4. 4.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 A 68 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)?
  6. 6.🧮 Resistors of 150 Ω, 47 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  7. 7.🧮 Resistors of 47 Ω, 10 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  8. 8.🧮 A 50 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)?
  9. 9.🧮 Resistors of 330 Ω, 33 Ω, 150 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 A 33 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)?
  11. 11.🧮 A 4.4 V battery is joined to 12 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  12. 12.🧮 Resistors of 10 Ω, 470 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  13. 13.🧮 Resistors of 33 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 A 6 V battery is joined to 10 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  16. 16.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 A 9 V battery is joined to 10 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 Two resistors in parallel give a total that is … (a) always zero (b) less than either one (c) their sum (d) more than either one
  19. 19.🧮 A 9 V battery is joined to 5 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  20. 20.🧮 Resistors of 33 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  21. 21.🧮 A 220 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)?
  22. 22.🧮 A 50 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)?
  23. 23.🧮 Resistors of 10 Ω, 22 Ω, 470 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 Resistors of 20 Ω, 22 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 A 20 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)?
  26. 26.🧮 Adding another resistor in series makes the total resistance … (a) smaller (b) stay the same (c) bigger (d) zero
  27. 27.🧮 An 8 V battery is joined to 4 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  28. 28.🧮 A 2.25 V battery is joined to 4 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  29. 29.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 Resistors of 50 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 A 1.75 V battery is joined to 2 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  32. 32.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 Resistors of 68 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 A 2 V battery is joined to 2 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  35. 35.🧮 Resistors of 68 Ω, 10 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 A 33 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)?
  37. 37.🧮 Resistors of 220 Ω, 68 Ω, 100 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 Resistors of 100 Ω, 50 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 A 470 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)?
  40. 40.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. 5
  2. 27
  3. 30
  4. 165
  5. 73
  6. 207
  7. 207
  8. 100
  9. 581
  10. 198
  11. 0.2
  12. 810
  13. 55
  14. 20
  15. 0.5
  16. 500
  17. 0.5
  18. less than either one
  19. 1
  20. 66
  21. 330
  22. 70
  23. 972
  24. 52
  25. 520
  26. bigger
  27. 0.5
  28. 0.25
  29. 50
  30. 100
  31. 0.25
  32. 50
  33. 90
  34. 0.5
  35. 228
  36. 143
  37. 435
  38. 218
  39. 705
  40. 20

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