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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 562 · 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 2.5 V battery is joined to 3 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  2. 2.🧮 Resistors of 150 Ω, 150 Ω, 33 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  3. 3.🧮 A 9 V battery is joined to 3 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  4. 4.🧮 Adding another resistor in series makes the total resistance … (a) stay the same (b) zero (c) bigger (d) smaller
  5. 5.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  6. 6.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 A 47 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)?
  8. 8.🧮 A 2.5 V battery is joined to 2 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  9. 9.🧮 Resistors of 10 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 A 1.6 V battery is joined to 4 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  11. 11.🧮 A 330 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)?
  12. 12.🧮 Two resistors in parallel give a total that is … (a) more than either one (b) their sum (c) less than either one (d) always zero
  13. 13.🧮 Resistors of 33 Ω, 22 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 Resistors of 22 Ω, 330 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  15. 15.🧮 Resistors of 20 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 Resistors of 33 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 A 4 V battery is joined to 12 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  22. 22.🧮 A 3.5 V battery is joined to 4 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  23. 23.🧮 Resistors of 50 Ω, 68 Ω, 20 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  25. 25.🧮 Resistors of 50 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 A 6 V battery is joined to 3 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  28. 28.🧮 Resistors of 220 Ω, 50 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  29. 29.🧮 A 47 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)?
  30. 30.🧮 Resistors of 100 Ω, 33 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 A 330 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)?
  33. 33.🧮 Resistors of 20 Ω, 150 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 A 15 V battery is joined to 10 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  36. 36.🧮 A 68 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)?
  37. 37.🧮 Resistors of 470 Ω, 330 Ω, 100 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 Resistors of 68 Ω, 10 Ω, 100 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 Resistors of 33 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  40. 40.🧮 A 10 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)?

Answer key

  1. 0.5
  2. 355
  3. 1
  4. bigger
  5. 50
  6. 10
  7. 147
  8. 0.5
  9. 340
  10. 0.2
  11. 430
  12. less than either one
  13. 105
  14. 402
  15. 53
  16. 165
  17. 235
  18. 183
  19. 25
  20. 100
  21. 0.25
  22. 0.5
  23. 188
  24. 5
  25. 270
  26. 110
  27. 1
  28. 303
  29. 157
  30. 353
  31. 20
  32. 355
  33. 238
  34. 5
  35. 1
  36. 233
  37. 1050
  38. 211
  39. 55
  40. 30

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