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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 897 · 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) always zero (b) less than either one (c) more than either one (d) their sum
  2. 2.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 Adding another resistor in series makes the total resistance … (a) bigger (b) zero (c) smaller (d) stay the same
  4. 4.🧮 A 150 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)?
  5. 5.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  6. 6.🧮 A 2.25 V battery is joined to 5 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  7. 7.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 Resistors of 10 Ω, 330 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  9. 9.🧮 A 1.75 V battery is joined to 4 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  10. 10.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 Resistors of 47 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  12. 12.🧮 A 6.5 V battery is joined to 5 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  13. 13.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 Resistors of 150 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  15. 15.🧮 A 47 Ω resistor is joined in series with two equal 330 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  16. 16.🧮 Resistors of 50 Ω, 20 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 Resistors of 20 Ω, 220 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  18. 18.🧮 Resistors of 100 Ω, 33 Ω, 10 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 Resistors of 470 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  20. 20.🧮 A 68 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)?
  21. 21.🧮 A 150 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)?
  22. 22.🧮 Resistors of 470 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 A 4 V battery is joined to 6 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  24. 24.🧮 A 3.2 V battery is joined to 6 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  25. 25.🧮 Resistors of 100 Ω, 20 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 A 1.2 V battery is joined to 8 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  28. 28.🧮 A 220 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)?
  29. 29.🧮 Resistors of 100 Ω, 20 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 Resistors of 10 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 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)?
  33. 33.🧮 Resistors of 47 Ω, 68 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 A 2.75 V battery is joined to 3 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  36. 36.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 A 1.4 V battery is joined to 2 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  38. 38.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 Resistors of 22 Ω, 68 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  40. 40.🧮 Resistors of 10 Ω, 20 Ω, 22 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. less than either one
  2. 100
  3. bigger
  4. 650
  5. 20
  6. 0.25
  7. 165
  8. 810
  9. 0.25
  10. 5
  11. 97
  12. 0.5
  13. 50
  14. 300
  15. 212
  16. 80
  17. 287
  18. 153
  19. 492
  20. 73
  21. 170
  22. 503
  23. 0.5
  24. 0.2
  25. 153
  26. 100
  27. 0.1
  28. 245
  29. 170
  30. 480
  31. 100
  32. 285
  33. 165
  34. 20
  35. 0.25
  36. 50
  37. 0.1
  38. 110
  39. 110
  40. 99

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