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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 75 · 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.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  4. 4.🧮 Resistors of 470 Ω, 470 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  5. 5.🧮 Resistors of 470 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  6. 6.🧮 Two resistors in parallel give a total that is … (a) their sum (b) always zero (c) less than either one (d) more than either one
  7. 7.🧮 A 12 V battery is joined to 2 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  8. 8.🧮 A 7.5 V battery is joined to 12 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  9. 9.🧮 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)?
  10. 10.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 Resistors of 22 Ω, 150 Ω, 68 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  12. 12.🧮 A 47 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)?
  13. 13.🧮 Adding another resistor in series makes the total resistance … (a) smaller (b) bigger (c) stay the same (d) zero
  14. 14.🧮 A 68 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)?
  15. 15.🧮 Resistors of 220 Ω, 330 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 A 2.25 V battery is joined to 6 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 Resistors of 50 Ω, 330 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 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)?
  22. 22.🧮 A 1.6 V battery is joined to 2 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  23. 23.🧮 A 20 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)?
  24. 24.🧮 A 150 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)?
  25. 25.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 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)?
  27. 27.🧮 A 22 V battery is joined to 12 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  28. 28.🧮 A 10 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.🧮 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)?
  30. 30.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 A 3 V battery is joined to 2 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  32. 32.🧮 A 4.5 V battery is joined to 4 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  33. 33.🧮 A 22 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)?
  34. 34.🧮 A 20 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)?
  35. 35.🧮 A 1 V battery is joined to 3 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  36. 36.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 Resistors of 22 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 Resistors of 220 Ω, 20 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  40. 40.🧮 A 470 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)?

Answer key

  1. 20
  2. 165
  3. 50
  4. 987
  5. 620
  6. less than either one
  7. 1
  8. 0.5
  9. 70
  10. 20
  11. 287
  12. 67
  13. bigger
  14. 168
  15. 880
  16. 10
  17. 0.25
  18. 402
  19. 5
  20. 25
  21. 75
  22. 0.2
  23. 120
  24. 200
  25. 100
  26. 150
  27. 1
  28. 245
  29. 53
  30. 20
  31. 0.5
  32. 0.5
  33. 257
  34. 40
  35. 0.2
  36. 110
  37. 90
  38. 262
  39. 20
  40. 580

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