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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 79 · 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.🧮 Two resistors in parallel give a total that is … (a) less than either one (b) always zero (c) more than either one (d) their sum
  2. 2.🧮 Adding another resistor in series makes the total resistance … (a) stay the same (b) smaller (c) bigger (d) zero
  3. 3.🧮 A 47 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)?
  4. 4.🧮 A 3.25 V battery is joined to 3 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  5. 5.🧮 Resistors of 150 Ω, 22 Ω, 20 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  6. 6.🧮 Resistors of 22 Ω, 220 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  7. 7.🧮 Resistors of 22 Ω, 150 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  8. 8.🧮 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)?
  9. 9.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 Resistors of 68 Ω, 150 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 A 330 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)?
  14. 14.🧮 A 14 V battery is joined to 4 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  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 50 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)?
  17. 17.🧮 A 33 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)?
  18. 18.🧮 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)?
  19. 19.🧮 An 8 V battery is joined to 10 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  20. 20.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 A 1.4 V battery is joined to 2 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  23. 23.🧮 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)?
  24. 24.🧮 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)?
  25. 25.🧮 A 7.5 V battery is joined to 12 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  26. 26.🧮 A 470 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)?
  27. 27.🧮 A 10 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.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 A 1.6 V battery is joined to 6 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  30. 30.🧮 A 0.6 V battery is joined to 3 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  31. 31.🧮 Resistors of 22 Ω, 68 Ω, 22 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 Resistors of 100 Ω, 22 Ω, 100 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 Resistors of 50 Ω, 33 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 A 2.2 V battery is joined to 3 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  36. 36.🧮 A 47 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)?
  37. 37.🧮 Resistors of 22 Ω, 20 Ω, 470 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 A 14 V battery is joined to 2 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  40. 40.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. less than either one
  2. bigger
  3. 157
  4. 0.25
  5. 412
  6. 310
  7. 192
  8. 110
  9. 20
  10. 240
  11. 100
  12. 10
  13. 335
  14. 1
  15. 200
  16. 160
  17. 43
  18. 27
  19. 0.5
  20. 10
  21. 25
  22. 0.1
  23. 285
  24. 255
  25. 0.5
  26. 475
  27. 110
  28. 5
  29. 0.2
  30. 0.1
  31. 180
  32. 5
  33. 242
  34. 133
  35. 0.2
  36. 52
  37. 612
  38. 25
  39. 1
  40. 20

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