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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 116 · 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 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 A 330 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)?
  3. 3.🧮 A 1 V battery is joined to 2 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  4. 4.🧮 Resistors of 68 Ω, 68 Ω, 68 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  5. 5.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  6. 6.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 A 6 V battery is joined to 4 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  8. 8.🧮 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)?
  9. 9.🧮 Two resistors in parallel give a total that is … (a) more than either one (b) their sum (c) less than either one (d) always zero
  10. 10.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 Resistors of 22 Ω, 100 Ω, 20 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  12. 12.🧮 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)?
  13. 13.🧮 Resistors of 22 Ω, 10 Ω, 50 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 Resistors of 10 Ω, 330 Ω, 20 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  15. 15.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 A 1.8 V battery is joined to 12 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  17. 17.🧮 A 3 V battery is joined to 3 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) stay the same (c) smaller (d) bigger
  19. 19.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 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)?
  21. 21.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 A 4.8 V battery is joined to 12 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  23. 23.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 A 3.75 V battery is joined to 5 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  25. 25.🧮 Three equal 60 Ω resistors are joined in parallel. 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.🧮 Resistors of 10 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  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.🧮 Resistors of 50 Ω, 47 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 Resistors of 20 Ω, 470 Ω, 330 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 Resistors of 10 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 A 2 V battery is joined to 10 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  33. 33.🧮 Resistors of 33 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 Resistors of 47 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 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)?
  37. 37.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 A 4.5 V battery is joined to 8 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  39. 39.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  40. 40.🧮 Resistors of 33 Ω, 150 Ω, 470 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. 235
  2. 350
  3. 0.2
  4. 272
  5. 50
  6. 50
  7. 0.5
  8. 285
  9. less than either one
  10. 165
  11. 152
  12. 178
  13. 115
  14. 510
  15. 5
  16. 0.1
  17. 0.5
  18. bigger
  19. 500
  20. 120
  21. 10
  22. 0.2
  23. 25
  24. 0.25
  25. 20
  26. 100
  27. 160
  28. 245
  29. 165
  30. 840
  31. 230
  32. 0.1
  33. 503
  34. 69
  35. 100
  36. 143
  37. 5
  38. 0.25
  39. 10
  40. 700

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