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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 524 · 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 68 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)?
  2. 2.🧮 Resistors of 50 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  3. 3.🧮 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)?
  4. 4.🧮 Resistors of 100 Ω, 33 Ω, 50 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  5. 5.🧮 Two resistors in parallel give a total that is … (a) always zero (b) less than either one (c) their sum (d) more than either one
  6. 6.🧮 A 1 V battery is joined to 8 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  7. 7.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 Resistors of 20 Ω, 33 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  9. 9.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 A 1.25 V battery is joined to 3 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  11. 11.🧮 Adding another resistor in series makes the total resistance … (a) stay the same (b) zero (c) smaller (d) bigger
  12. 12.🧮 A 150 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)?
  13. 13.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 A 3.5 V battery is joined to 3 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 A 22 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)?
  19. 19.🧮 A 1.2 V battery is joined to 8 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  20. 20.🧮 A 150 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)?
  21. 21.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 A 330 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.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 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)?
  25. 25.🧮 Resistors of 10 Ω, 100 Ω, 33 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  28. 28.🧮 A 1.5 V battery is joined to 12 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  29. 29.🧮 A 22 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)?
  30. 30.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 A 3 V battery is joined to 2 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  32. 32.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 Resistors of 47 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 Resistors of 150 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 Resistors of 50 Ω, 470 Ω, 10 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 Resistors of 100 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 A 0.7 V battery is joined to 3 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  39. 39.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  40. 40.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. 88
  2. 72
  3. 350
  4. 251
  5. less than either one
  6. 0.1
  7. 5
  8. 523
  9. 110
  10. 0.25
  11. bigger
  12. 315
  13. 20
  14. 20
  15. 10
  16. 20
  17. 0.5
  18. 32
  19. 0.1
  20. 650
  21. 50
  22. 565
  23. 235
  24. 143
  25. 613
  26. 165
  27. 25
  28. 0.1
  29. 522
  30. 5
  31. 0.5
  32. 100
  33. 197
  34. 300
  35. 550
  36. 5
  37. 133
  38. 0.1
  39. 25
  40. 50

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