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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 29 · 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 4.25 V battery is joined to 12 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  2. 2.🧮 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)?
  3. 3.🧮 Two resistors in parallel give a total that is … (a) more than either one (b) their sum (c) less than either one (d) always zero
  4. 4.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 Resistors of 50 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  6. 6.🧮 Resistors of 150 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  7. 7.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 A 1.2 V battery is joined to 2 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  9. 9.🧮 Adding another resistor in series makes the total resistance … (a) bigger (b) zero (c) stay the same (d) smaller
  10. 10.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 A 10 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)?
  13. 13.🧮 A 330 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)?
  14. 14.🧮 Resistors of 68 Ω, 47 Ω, 20 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  15. 15.🧮 A 9 V battery is joined to 12 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  16. 16.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 Resistors of 330 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  18. 18.🧮 Resistors of 68 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 A 0.8 V battery is joined to 5 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  20. 20.🧮 A 10 V battery is joined to 2 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  21. 21.🧮 A 150 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)?
  22. 22.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 A 0.9 V battery is joined to 5 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  24. 24.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  25. 25.🧮 Resistors of 10 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 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)?
  27. 27.🧮 A 470 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)?
  28. 28.🧮 Resistors of 220 Ω, 470 Ω, 220 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  29. 29.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 A 3.5 V battery is joined to 2 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  32. 32.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 A 2.2 V battery is joined to 5 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  35. 35.🧮 A 3.2 V battery is joined to 10 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  36. 36.🧮 A 1 V battery is joined to 8 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  37. 37.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  40. 40.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. 0.25
  2. 35
  3. less than either one
  4. 50
  5. 70
  6. 480
  7. 165
  8. 0.1
  9. bigger
  10. 20
  11. 5
  12. 120
  13. 340
  14. 355
  15. 0.5
  16. 50
  17. 398
  18. 115
  19. 0.1
  20. 1
  21. 385
  22. 5
  23. 0.1
  24. 10
  25. 20
  26. 32
  27. 570
  28. 957
  29. 50
  30. 110
  31. 0.5
  32. 20
  33. 10
  34. 0.2
  35. 0.2
  36. 0.1
  37. 500
  38. 5
  39. 25
  40. 25

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