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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 5 · 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.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 A 2 V battery is joined to 8 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  4. 4.🧮 Resistors of 10 Ω, 20 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  5. 5.🧮 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)?
  6. 6.🧮 A 470 Ω resistor is joined in series with two equal 100 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  7. 7.🧮 Resistors of 20 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  8. 8.🧮 A 9 V battery is joined to 6 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  9. 9.🧮 A 22 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)?
  10. 10.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 A 1.2 V battery is joined to 2 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  12. 12.🧮 A 22 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)?
  13. 13.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 A 330 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)?
  16. 16.🧮 Adding another resistor in series makes the total resistance … (a) smaller (b) stay the same (c) zero (d) bigger
  17. 17.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 Two resistors in parallel give a total that is … (a) always zero (b) more than either one (c) their sum (d) less than either one
  19. 19.🧮 A 1.5 V battery is joined to 3 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  20. 20.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 A 33 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)?
  23. 23.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 A 2 V battery is joined to 2 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  25. 25.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 A 330 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)?
  28. 28.🧮 Resistors of 47 Ω, 20 Ω, 10 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  29. 29.🧮 A 15 V battery is joined to 12 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  30. 30.🧮 A 6 V battery is joined to 3 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  31. 31.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 Resistors of 20 Ω, 22 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 Resistors of 20 Ω, 220 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 Resistors of 10 Ω, 100 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 A 150 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)?
  37. 37.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 Resistors of 330 Ω, 100 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  40. 40.🧮 A 1.5 V battery is joined to 12 Ω and 3 Ω resistors in series. What current flows (in amperes)? =

Answer key

  1. 50
  2. 100
  3. 0.1
  4. 130
  5. 67
  6. 520
  7. 30
  8. 1
  9. 47
  10. 5
  11. 0.2
  12. 122
  13. 500
  14. 25
  15. 335
  16. bigger
  17. 235
  18. less than either one
  19. 0.1
  20. 20
  21. 20
  22. 43
  23. 50
  24. 0.5
  25. 50
  26. 5
  27. 340
  28. 177
  29. 1
  30. 1
  31. 100
  32. 92
  33. 25
  34. 250
  35. 580
  36. 170
  37. 10
  38. 110
  39. 477
  40. 0.1

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