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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 541 · 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 68 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)?
  2. 2.🧮 A 2.5 V battery is joined to 6 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  3. 3.🧮 A 10 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)?
  4. 4.🧮 A 3.5 V battery is joined to 3 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  5. 5.🧮 Adding another resistor in series makes the total resistance … (a) stay the same (b) zero (c) smaller (d) bigger
  6. 6.🧮 Resistors of 100 Ω, 150 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  7. 7.🧮 A 33 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)?
  8. 8.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 Two resistors in parallel give a total that is … (a) less than either one (b) their sum (c) more than either one (d) always zero
  12. 12.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 A 2 V battery is joined to 6 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  14. 14.🧮 Resistors of 68 Ω, 220 Ω, 470 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  15. 15.🧮 A 100 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)?
  16. 16.🧮 A 3.5 V battery is joined to 12 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  17. 17.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 Resistors of 20 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 Resistors of 20 Ω, 220 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 Resistors of 470 Ω, 470 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  25. 25.🧮 A 220 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.🧮 A 10 V battery is joined to 10 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  27. 27.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  28. 28.🧮 Resistors of 150 Ω, 100 Ω, 10 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  29. 29.🧮 A 100 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)?
  30. 30.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 A 1.75 V battery is joined to 5 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  32. 32.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 Resistors of 20 Ω, 33 Ω, 50 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 Resistors of 100 Ω, 20 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 A 4 V battery is joined to 2 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  38. 38.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 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)?
  40. 40.🧮 A 1.5 V battery is joined to 3 Ω and 12 Ω resistors in series. What current flows (in amperes)? =

Answer key

  1. 88
  2. 0.25
  3. 15
  4. 0.5
  5. bigger
  6. 470
  7. 53
  8. 20
  9. 5
  10. 165
  11. less than either one
  12. 50
  13. 0.2
  14. 791
  15. 200
  16. 0.25
  17. 20
  18. 67
  19. 50
  20. 500
  21. 250
  22. 950
  23. 10
  24. 100
  25. 720
  26. 0.5
  27. 25
  28. 590
  29. 150
  30. 100
  31. 0.25
  32. 5
  33. 253
  34. 10
  35. 167
  36. 100
  37. 1
  38. 50
  39. 70
  40. 0.1

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