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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 861 · 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 equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 Resistors of 100 Ω and 150 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 1000 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  4. 4.🧮 A 1 V battery is joined to 2 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  5. 5.🧮 A 2.8 V battery is joined to 10 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  6. 6.🧮 Resistors of 50 Ω, 50 Ω, 22 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  7. 7.🧮 A 47 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)?
  8. 8.🧮 Two resistors in parallel give a total that is … (a) more than either one (b) less than either one (c) their sum (d) always zero
  9. 9.🧮 A 50 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.🧮 A 3.5 V battery is joined to 12 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  11. 11.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 An 11 V battery is joined to 12 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  14. 14.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 A 20 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)?
  16. 16.🧮 A 2.2 V battery is joined to 10 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  17. 17.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 A 4.5 V battery is joined to 10 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  19. 19.🧮 Resistors of 100 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  20. 20.🧮 Resistors of 470 Ω, 47 Ω, 100 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  21. 21.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 A 1.1 V battery is joined to 6 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  23. 23.🧮 Resistors of 150 Ω, 20 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) bigger (c) stay the same (d) smaller
  25. 25.🧮 Resistors of 220 Ω, 100 Ω, 330 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 Resistors of 20 Ω, 50 Ω, 47 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 Resistors of 20 Ω, 150 Ω, 47 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 A 2.4 V battery is joined to 12 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  31. 31.🧮 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)?
  32. 32.🧮 A 50 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.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 Resistors of 47 Ω, 33 Ω, 330 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 Resistors of 22 Ω, 33 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 An 11 V battery is joined to 5 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  37. 37.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 A 470 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)?
  39. 39.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  40. 40.🧮 Resistors of 10 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. 20
  2. 250
  3. 830
  4. 0.2
  5. 0.2
  6. 169
  7. 72
  8. less than either one
  9. 75
  10. 0.25
  11. 25
  12. 5
  13. 0.5
  14. 10
  15. 520
  16. 0.1
  17. 10
  18. 0.25
  19. 133
  20. 837
  21. 165
  22. 0.1
  23. 217
  24. bigger
  25. 683
  26. 20
  27. 185
  28. 100
  29. 239
  30. 0.1
  31. 335
  32. 550
  33. 25
  34. 430
  35. 88
  36. 1
  37. 110
  38. 495
  39. 100
  40. 60

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