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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 65 · 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.🧮 A 2.6 V battery is joined to 8 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  2. 2.🧮 Resistors of 33 Ω, 470 Ω, 100 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  3. 3.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  4. 4.🧮 Resistors of 10 Ω, 220 Ω, 68 Ω and 330 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.🧮 Resistors of 20 Ω, 68 Ω, 33 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  7. 7.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 Two resistors in parallel give a total that is … (a) their sum (b) always zero (c) less than either one (d) more than either one
  10. 10.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) smaller (c) bigger (d) stay the same
  11. 11.🧮 A 20 V battery is joined to 12 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  12. 12.🧮 Resistors of 150 Ω, 330 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  13. 13.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 A 68 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)?
  15. 15.🧮 A 0.8 V battery is joined to 6 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  16. 16.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 A 4 V battery is joined to 12 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 A 3.6 V battery is joined to 6 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  19. 19.🧮 A 4.25 V battery is joined to 12 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  20. 20.🧮 A 0.5 V battery is joined to 3 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  21. 21.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 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)?
  23. 23.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 An 18 V battery is joined to 12 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  25. 25.🧮 Resistors of 22 Ω, 220 Ω, 50 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 A 47 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)?
  27. 27.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  28. 28.🧮 A 330 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)?
  29. 29.🧮 A 4.4 V battery is joined to 12 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  30. 30.🧮 A 2.8 V battery is joined to 12 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  31. 31.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 A 470 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)?
  33. 33.🧮 A 470 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)?
  34. 34.🧮 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)?
  35. 35.🧮 A 10 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)?
  36. 36.🧮 Resistors of 47 Ω, 68 Ω, 68 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 Resistors of 470 Ω, 220 Ω, 68 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 A 1.4 V battery is joined to 8 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  39. 39.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  40. 40.🧮 A 47 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)?

Answer key

  1. 0.2
  2. 623
  3. 25
  4. 628
  5. 50
  6. 221
  7. 100
  8. 10
  9. less than either one
  10. bigger
  11. 1
  12. 513
  13. 110
  14. 168
  15. 0.1
  16. 20
  17. 0.2
  18. 0.2
  19. 0.25
  20. 0.1
  21. 5
  22. 255
  23. 20
  24. 1
  25. 622
  26. 282
  27. 100
  28. 830
  29. 0.2
  30. 0.2
  31. 165
  32. 970
  33. 635
  34. 110
  35. 20
  36. 513
  37. 791
  38. 0.1
  39. 20
  40. 57

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