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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 828 · 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.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) bigger (c) stay the same (d) smaller
  2. 2.🧮 A 5 V battery is joined to 2 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  3. 3.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  4. 4.🧮 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)?
  5. 5.🧮 A 330 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)?
  6. 6.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 A 150 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)?
  8. 8.🧮 Two resistors in parallel give a total that is … (a) more than either one (b) less than either one (c) always zero (d) their sum
  9. 9.🧮 Resistors of 68 Ω, 10 Ω, 10 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 A 0.7 V battery is joined to 3 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  11. 11.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 Resistors of 50 Ω, 20 Ω, 330 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 An 18 V battery is joined to 6 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  15. 15.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 Resistors of 220 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 Resistors of 20 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  18. 18.🧮 Resistors of 100 Ω, 47 Ω, 330 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 A 220 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)?
  20. 20.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 A 470 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)?
  22. 22.🧮 Resistors of 50 Ω, 470 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 Resistors of 220 Ω, 220 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 A 1.4 V battery is joined to 6 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  25. 25.🧮 An 8 V battery is joined to 3 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  26. 26.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 Resistors of 470 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 A 1.6 V battery is joined to 5 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  29. 29.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 A 1 V battery is joined to 8 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  31. 31.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 Resistors of 10 Ω, 20 Ω, 68 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 Resistors of 33 Ω, 470 Ω, 330 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 Resistors of 50 Ω, 150 Ω, 100 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 Resistors of 22 Ω, 100 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 A 5.5 V battery is joined to 12 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  38. 38.🧮 Resistors of 20 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  40. 40.🧮 A 68 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)?

Answer key

  1. bigger
  2. 0.5
  3. 10
  4. 245
  5. 430
  6. 235
  7. 385
  8. less than either one
  9. 558
  10. 0.1
  11. 50
  12. 110
  13. 620
  14. 1
  15. 50
  16. 288
  17. 120
  18. 697
  19. 720
  20. 5
  21. 480
  22. 570
  23. 590
  24. 0.1
  25. 1
  26. 10
  27. 490
  28. 0.2
  29. 5
  30. 0.1
  31. 500
  32. 148
  33. 901
  34. 25
  35. 347
  36. 190
  37. 0.25
  38. 240
  39. 5
  40. 303

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