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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 273 · 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 1.1 V battery is joined to 5 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  2. 2.🧮 Two resistors in parallel give a total that is … (a) their sum (b) less than either one (c) always zero (d) more than either one
  3. 3.🧮 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)?
  4. 4.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  6. 6.🧮 A 1.3 V battery is joined to 5 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  7. 7.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 Resistors of 150 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  9. 9.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) bigger (c) smaller (d) stay the same
  10. 10.🧮 A 7 V battery is joined to 2 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  11. 11.🧮 A 7 V battery is joined to 12 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  12. 12.🧮 A 2 V battery is joined to 4 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  13. 13.🧮 A 3.25 V battery is joined to 10 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  14. 14.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 A 2 V battery is joined to 3 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  16. 16.🧮 Resistors of 330 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 A 220 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)?
  18. 18.🧮 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)?
  19. 19.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 A 1.5 V battery is joined to 10 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  21. 21.🧮 Resistors of 470 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 A 470 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.🧮 A 1.1 V battery is joined to 8 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  24. 24.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  25. 25.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 Resistors of 47 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  28. 28.🧮 A 0.8 V battery is joined to 5 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  29. 29.🧮 Resistors of 47 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 Resistors of 330 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 Resistors of 100 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 A 2.25 V battery is joined to 5 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  34. 34.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 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)?
  36. 36.🧮 A 1.2 V battery is joined to 2 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  37. 37.🧮 Resistors of 50 Ω, 100 Ω, 470 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 A 33 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)?
  39. 39.🧮 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)?
  40. 40.🧮 Resistors of 330 Ω, 330 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. 0.1
  2. less than either one
  3. 67
  4. 50
  5. 20
  6. 0.1
  7. 10
  8. 160
  9. bigger
  10. 1
  11. 0.5
  12. 0.2
  13. 0.25
  14. 100
  15. 0.25
  16. 377
  17. 720
  18. 430
  19. 25
  20. 0.1
  21. 503
  22. 705
  23. 0.1
  24. 10
  25. 5
  26. 94
  27. 50
  28. 0.1
  29. 197
  30. 363
  31. 147
  32. 110
  33. 0.25
  34. 50
  35. 565
  36. 0.1
  37. 653
  38. 83
  39. 245
  40. 990

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