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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 799 · 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.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 Resistors of 10 Ω, 33 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  3. 3.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  4. 4.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  6. 6.🧮 A 10 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)?
  7. 7.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 A 5 V battery is joined to 12 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  9. 9.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 Adding another resistor in series makes the total resistance … (a) bigger (b) smaller (c) stay the same (d) zero
  11. 11.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 Resistors of 20 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  13. 13.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 Two resistors in parallel give a total that is … (a) always zero (b) more than either one (c) their sum (d) less than either one
  15. 15.🧮 Resistors of 68 Ω, 33 Ω, 470 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 A 6 V battery is joined to 2 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 Resistors of 50 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 Resistors of 33 Ω, 68 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  20. 20.🧮 Resistors of 50 Ω, 10 Ω, 22 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  21. 21.🧮 Resistors of 10 Ω, 220 Ω, 22 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 A 10 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)?
  23. 23.🧮 Resistors of 150 Ω, 22 Ω, 22 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 A 50 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)?
  25. 25.🧮 Resistors of 68 Ω, 50 Ω, 47 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 Resistors of 150 Ω, 68 Ω, 330 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  28. 28.🧮 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)?
  29. 29.🧮 Resistors of 10 Ω, 50 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 Resistors of 33 Ω, 470 Ω, 100 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 Resistors of 68 Ω, 68 Ω, 68 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 A 3 V battery is joined to 2 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  33. 33.🧮 A 12 V battery is joined to 10 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  34. 34.🧮 A 3.25 V battery is joined to 5 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  35. 35.🧮 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)?
  36. 36.🧮 Resistors of 50 Ω, 20 Ω, 33 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 Resistors of 50 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 A 100 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)?
  39. 39.🧮 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)?
  40. 40.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. 10
  2. 513
  3. 500
  4. 50
  5. 25
  6. 35
  7. 235
  8. 0.25
  9. 5
  10. bigger
  11. 20
  12. 67
  13. 20
  14. less than either one
  15. 671
  16. 20
  17. 1
  18. 150
  19. 123
  20. 129
  21. 272
  22. 60
  23. 216
  24. 550
  25. 185
  26. 558
  27. 100
  28. 255
  29. 160
  30. 650
  31. 226
  32. 0.25
  33. 1
  34. 0.25
  35. 75
  36. 203
  37. 72
  38. 110
  39. 30
  40. 110

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