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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 731 · 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) their sum (b) always zero (c) more than either one (d) less than either one
  2. 2.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  4. 4.🧮 A 470 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)?
  5. 5.🧮 A 2.4 V battery is joined to 4 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  6. 6.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 Adding another resistor in series makes the total resistance … (a) bigger (b) zero (c) smaller (d) stay the same
  8. 8.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 Resistors of 220 Ω, 470 Ω, 33 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 Resistors of 33 Ω, 33 Ω, 20 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  12. 12.🧮 A 1.2 V battery is joined to 8 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  13. 13.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 Resistors of 47 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  15. 15.🧮 A 4.5 V battery is joined to 3 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  16. 16.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 Resistors of 10 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  18. 18.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  19. 19.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 An 8 V battery is joined to 3 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  22. 22.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 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)?
  25. 25.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 Resistors of 470 Ω, 470 Ω, 50 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 Resistors of 20 Ω, 20 Ω, 220 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 Resistors of 470 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 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)?
  32. 32.🧮 A 3.2 V battery is joined to 12 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  33. 33.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 A 33 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)?
  35. 35.🧮 A 10 V battery is joined to 8 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  36. 36.🧮 A 16 V battery is joined to 6 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  37. 37.🧮 A 1.3 V battery is joined to 8 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  38. 38.🧮 Resistors of 330 Ω, 33 Ω, 33 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 A 20 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)?
  40. 40.🧮 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)?

Answer key

  1. less than either one
  2. 10
  3. 50
  4. 580
  5. 0.2
  6. 100
  7. bigger
  8. 5
  9. 873
  10. 5
  11. 556
  12. 0.1
  13. 10
  14. 147
  15. 0.5
  16. 25
  17. 60
  18. 50
  19. 10
  20. 110
  21. 1
  22. 5
  23. 100
  24. 168
  25. 20
  26. 1010
  27. 730
  28. 165
  29. 50
  30. 940
  31. 533
  32. 0.2
  33. 20
  34. 38
  35. 1
  36. 1
  37. 0.1
  38. 616
  39. 40
  40. 120

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