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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 858 · 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.🧮 Adding another resistor in series makes the total resistance … (a) bigger (b) stay the same (c) zero (d) smaller
  2. 2.🧮 Two resistors in parallel give a total that is … (a) more than either one (b) their sum (c) always zero (d) less than either one
  3. 3.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  4. 4.🧮 Resistors of 10 Ω, 68 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  5. 5.🧮 Resistors of 33 Ω, 10 Ω, 470 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  6. 6.🧮 Four equal 20 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 1.75 V battery is joined to 2 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  9. 9.🧮 Resistors of 20 Ω, 20 Ω, 10 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 Resistors of 10 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 A 0.5 V battery is joined to 2 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  13. 13.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 A 20 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)?
  15. 15.🧮 A 20 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)?
  16. 16.🧮 Resistors of 10 Ω, 50 Ω, 20 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 A 2.4 V battery is joined to 12 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 A 1 V battery is joined to 2 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  19. 19.🧮 A 100 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)?
  20. 20.🧮 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)?
  21. 21.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 A 1.6 V battery is joined to 12 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  25. 25.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 A 50 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.🧮 Resistors of 470 Ω, 50 Ω, 50 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 A 3.6 V battery is joined to 10 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  29. 29.🧮 A 47 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)?
  30. 30.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 Resistors of 50 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 A 4 V battery is joined to 4 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  34. 34.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 Resistors of 150 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 A 1.2 V battery is joined to 4 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  39. 39.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  40. 40.🧮 Resistors of 470 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. bigger
  2. less than either one
  3. 25
  4. 111
  5. 533
  6. 5
  7. 50
  8. 0.25
  9. 100
  10. 57
  11. 5
  12. 0.1
  13. 500
  14. 255
  15. 120
  16. 230
  17. 0.1
  18. 0.2
  19. 150
  20. 550
  21. 50
  22. 5
  23. 165
  24. 0.1
  25. 10
  26. 285
  27. 603
  28. 0.2
  29. 52
  30. 25
  31. 200
  32. 20
  33. 0.5
  34. 100
  35. 200
  36. 10
  37. 100
  38. 0.1
  39. 110
  40. 480

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