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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 3 · 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.

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  1. 1.🧮 A 1.4 V battery is joined to 3 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  2. 2.🧮 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
  3. 3.🧮 A 20 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)?
  4. 4.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) smaller (c) stay the same (d) bigger
  5. 5.🧮 A 1.4 V battery is joined to 5 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  6. 6.🧮 Resistors of 220 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  7. 7.🧮 A 3 V battery is joined to 3 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  8. 8.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 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)?
  10. 10.🧮 A 14 V battery is joined to 12 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  11. 11.🧮 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)?
  12. 12.🧮 A 68 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)?
  13. 13.🧮 Resistors of 330 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 A 220 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)?
  17. 17.🧮 A 100 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)?
  18. 18.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  19. 19.🧮 Resistors of 47 Ω, 47 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  20. 20.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 Two equal 330 Ω resistors are joined in parallel. 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 50 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)?
  25. 25.🧮 Resistors of 47 Ω, 33 Ω, 470 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 A 68 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)?
  27. 27.🧮 A 33 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)?
  28. 28.🧮 Resistors of 220 Ω, 68 Ω, 330 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  29. 29.🧮 Resistors of 20 Ω, 47 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 A 3.4 V battery is joined to 5 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  31. 31.🧮 A 6 V battery is joined to 3 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  32. 32.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 A 1.5 V battery is joined to 5 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  35. 35.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 A 1.1 V battery is joined to 6 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  38. 38.🧮 Resistors of 20 Ω, 22 Ω, 150 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 A 5 V battery is joined to 8 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  40. 40.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. 0.2
  2. less than either one
  3. 25
  4. bigger
  5. 0.2
  6. 230
  7. 0.5
  8. 50
  9. 43
  10. 1
  11. 335
  12. 178
  13. 350
  14. 10
  15. 5
  16. 245
  17. 105
  18. 25
  19. 564
  20. 235
  21. 25
  22. 165
  23. 50
  24. 60
  25. 583
  26. 118
  27. 268
  28. 668
  29. 117
  30. 0.2
  31. 1
  32. 10
  33. 5
  34. 0.1
  35. 20
  36. 10
  37. 0.1
  38. 662
  39. 0.25
  40. 20

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