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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 193 · 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 2.4 V battery is joined to 4 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  2. 2.🧮 A 3.5 V battery is joined to 8 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  3. 3.🧮 Two resistors in parallel give a total that is … (a) their sum (b) less than either one (c) more than either one (d) always zero
  4. 4.🧮 A 2.5 V battery is joined to 8 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  5. 5.🧮 Resistors of 100 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  6. 6.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 A 330 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)?
  9. 9.🧮 A 13 V battery is joined to 10 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  10. 10.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 Resistors of 150 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  12. 12.🧮 Adding another resistor in series makes the total resistance … (a) stay the same (b) bigger (c) smaller (d) zero
  13. 13.🧮 Resistors of 22 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 A 16 V battery is joined to 12 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  16. 16.🧮 Resistors of 470 Ω, 68 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 A 1 V battery is joined to 2 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 A 10 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)?
  19. 19.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 An 8 V battery is joined to 4 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  21. 21.🧮 Resistors of 20 Ω, 50 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 Resistors of 10 Ω, 10 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  25. 25.🧮 Resistors of 33 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 A 220 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)?
  27. 27.🧮 A 14 V battery is joined to 2 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  28. 28.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 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)?
  30. 30.🧮 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)?
  31. 31.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 Resistors of 47 Ω, 20 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 Resistors of 220 Ω, 47 Ω, 470 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 Resistors of 22 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 Resistors of 22 Ω, 10 Ω, 22 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 A 470 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)?
  38. 38.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 A 47 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)?
  40. 40.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. 0.2
  2. 0.25
  3. less than either one
  4. 0.25
  5. 110
  6. 20
  7. 50
  8. 340
  9. 1
  10. 10
  11. 620
  12. bigger
  13. 72
  14. 235
  15. 1
  16. 688
  17. 0.2
  18. 35
  19. 25
  20. 1
  21. 80
  22. 25
  23. 350
  24. 165
  25. 55
  26. 455
  27. 1
  28. 50
  29. 30
  30. 355
  31. 110
  32. 217
  33. 757
  34. 55
  35. 122
  36. 5
  37. 580
  38. 100
  39. 547
  40. 500

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