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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 409 · 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) zero (b) stay the same (c) bigger (d) smaller
  2. 2.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 A 1 V battery is joined to 2 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  4. 4.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 A 470 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)?
  6. 6.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 Two resistors in parallel give a total that is … (a) less than either one (b) always zero (c) more than either one (d) their sum
  8. 8.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 Resistors of 20 Ω, 20 Ω and 100 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.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 A 1.8 V battery is joined to 4 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  13. 13.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 A 20 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)?
  17. 17.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 Resistors of 330 Ω, 330 Ω, 150 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 A 22 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)?
  20. 20.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 Resistors of 22 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 Resistors of 20 Ω, 47 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 Resistors of 68 Ω, 470 Ω, 10 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 Resistors of 20 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 Resistors of 100 Ω, 470 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 A 330 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)?
  28. 28.🧮 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)?
  29. 29.🧮 Resistors of 470 Ω, 20 Ω, 68 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 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)?
  32. 32.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 A 4 V battery is joined to 8 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  34. 34.🧮 A 1.7 V battery is joined to 5 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  35. 35.🧮 Resistors of 470 Ω, 22 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 A 470 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)?
  37. 37.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 A 0.5 V battery is joined to 3 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  39. 39.🧮 A 47 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 50 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. bigger
  2. 50
  3. 0.1
  4. 25
  5. 520
  6. 500
  7. less than either one
  8. 100
  9. 140
  10. 198
  11. 20
  12. 0.2
  13. 50
  14. 20
  15. 235
  16. 130
  17. 100
  18. 878
  19. 32
  20. 5
  21. 44
  22. 25
  23. 114
  24. 768
  25. 240
  26. 580
  27. 355
  28. 45
  29. 580
  30. 20
  31. 143
  32. 165
  33. 0.25
  34. 0.1
  35. 642
  36. 480
  37. 25
  38. 0.1
  39. 52
  40. 70

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