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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 149 · 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 equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 A 100 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)?
  3. 3.🧮 Resistors of 20 Ω, 68 Ω, 22 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  4. 4.🧮 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)?
  5. 5.🧮 Adding another resistor in series makes the total resistance … (a) smaller (b) bigger (c) zero (d) stay the same
  6. 6.🧮 A 4.5 V battery is joined to 8 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  7. 7.🧮 A 33 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)?
  8. 8.🧮 A 47 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)?
  9. 9.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 A 330 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)?
  11. 11.🧮 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)?
  12. 12.🧮 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)?
  13. 13.🧮 Resistors of 10 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 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
  15. 15.🧮 Resistors of 20 Ω, 470 Ω, 10 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 A 14 V battery is joined to 6 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  19. 19.🧮 A 1.7 V battery is joined to 5 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  20. 20.🧮 A 20 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)?
  21. 21.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 Resistors of 20 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  25. 25.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 A 1.25 V battery is joined to 3 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  27. 27.🧮 A 4 V battery is joined to 4 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  28. 28.🧮 A 33 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)?
  29. 29.🧮 Resistors of 330 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 A 100 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)?
  32. 32.🧮 A 4 V battery is joined to 2 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  33. 33.🧮 A 0.8 V battery is joined to 6 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  34. 34.🧮 A 1.3 V battery is joined to 3 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  35. 35.🧮 A 2.8 V battery is joined to 4 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  36. 36.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 An 8.5 V battery is joined to 5 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  38. 38.🧮 A 1.2 V battery is joined to 10 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  39. 39.🧮 Resistors of 33 Ω, 20 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  40. 40.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. 110
  2. 210
  3. 160
  4. 570
  5. bigger
  6. 0.25
  7. 533
  8. 72
  9. 20
  10. 440
  11. 67
  12. 73
  13. 340
  14. less than either one
  15. 533
  16. 5
  17. 500
  18. 1
  19. 0.1
  20. 185
  21. 10
  22. 25
  23. 30
  24. 50
  25. 5
  26. 0.25
  27. 0.25
  28. 143
  29. 363
  30. 5
  31. 335
  32. 1
  33. 0.1
  34. 0.1
  35. 0.2
  36. 10
  37. 0.5
  38. 0.1
  39. 523
  40. 100

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