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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 238 · 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.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 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
  3. 3.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  4. 4.🧮 A 0.6 V battery is joined to 2 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  5. 5.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  6. 6.🧮 Resistors of 68 Ω, 10 Ω, 100 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  7. 7.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 A 20 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)?
  10. 10.🧮 A 2 V battery is joined to 4 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  11. 11.🧮 A 1.2 V battery is joined to 10 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  12. 12.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 A 1.1 V battery is joined to 3 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  14. 14.🧮 Adding another resistor in series makes the total resistance … (a) smaller (b) stay the same (c) zero (d) bigger
  15. 15.🧮 A 50 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)?
  16. 16.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 A 22 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)?
  18. 18.🧮 A 1.8 V battery is joined to 10 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  19. 19.🧮 A 220 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)?
  20. 20.🧮 Five equal 50 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 200 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  22. 22.🧮 A 7.5 V battery is joined to 5 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  23. 23.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 Resistors of 150 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 Resistors of 50 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 A 5.5 V battery is joined to 12 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  28. 28.🧮 A 0.8 V battery is joined to 6 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  29. 29.🧮 A 100 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)?
  30. 30.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 Resistors of 330 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 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)?
  35. 35.🧮 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)?
  36. 36.🧮 A 1.8 V battery is joined to 6 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  37. 37.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 A 2.2 V battery is joined to 3 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  39. 39.🧮 A 68 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)?
  40. 40.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. 100
  2. less than either one
  3. 100
  4. 0.1
  5. 500
  6. 188
  7. 5
  8. 10
  9. 30
  10. 0.2
  11. 0.1
  12. 20
  13. 0.1
  14. bigger
  15. 285
  16. 25
  17. 27
  18. 0.1
  19. 270
  20. 10
  21. 150
  22. 0.5
  23. 165
  24. 197
  25. 25
  26. 270
  27. 0.25
  28. 0.1
  29. 600
  30. 100
  31. 25
  32. 380
  33. 100
  34. 35
  35. 580
  36. 0.1
  37. 110
  38. 0.2
  39. 178
  40. 25

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