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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 521 · 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 100 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)?
  2. 2.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 A 2.5 V battery is joined to 5 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  4. 4.🧮 A 1.6 V battery is joined to 6 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  5. 5.🧮 Two resistors in parallel give a total that is … (a) less than either one (b) more than either one (c) their sum (d) always zero
  6. 6.🧮 A 50 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)?
  7. 7.🧮 A 150 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)?
  8. 8.🧮 Resistors of 10 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  9. 9.🧮 A 47 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)?
  10. 10.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 Adding another resistor in series makes the total resistance … (a) stay the same (b) bigger (c) smaller (d) zero
  12. 12.🧮 A 4 V battery is joined to 4 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  13. 13.🧮 Four equal 20 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 220 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  15. 15.🧮 Resistors of 220 Ω, 220 Ω, 68 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 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)?
  19. 19.🧮 Resistors of 22 Ω and 10 Ω are joined in series. 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.🧮 Resistors of 10 Ω and 150 Ω are joined in series. 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 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 Resistors of 50 Ω, 50 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 A 4.5 V battery is joined to 5 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  26. 26.🧮 A 3.4 V battery is joined to 12 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  27. 27.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  28. 28.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 A 22 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.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 Resistors of 68 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 An 8.5 V battery is joined to 12 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  35. 35.🧮 A 220 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)?
  36. 36.🧮 A 6 V battery is joined to 2 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  37. 37.🧮 Resistors of 150 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 A 3.2 V battery is joined to 10 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  40. 40.🧮 Resistors of 220 Ω, 10 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. 120
  2. 20
  3. 0.25
  4. 0.2
  5. less than either one
  6. 55
  7. 260
  8. 230
  9. 97
  10. 235
  11. bigger
  12. 0.5
  13. 5
  14. 130
  15. 728
  16. 25
  17. 10
  18. 120
  19. 32
  20. 100
  21. 160
  22. 165
  23. 10
  24. 320
  25. 0.5
  26. 0.2
  27. 20
  28. 100
  29. 132
  30. 110
  31. 88
  32. 25
  33. 50
  34. 0.5
  35. 270
  36. 0.5
  37. 480
  38. 50
  39. 0.2
  40. 250

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