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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 663 · 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 2.8 V battery is joined to 2 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  2. 2.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 A 20 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)?
  4. 4.🧮 A 47 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)?
  5. 5.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  6. 6.🧮 Two resistors in parallel give a total that is … (a) always zero (b) more than either one (c) their sum (d) less than either one
  7. 7.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 A 1.7 V battery is joined to 5 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  11. 11.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 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)?
  14. 14.🧮 Adding another resistor in series makes the total resistance … (a) stay the same (b) zero (c) smaller (d) bigger
  15. 15.🧮 Resistors of 220 Ω, 220 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 A 150 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)?
  18. 18.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  19. 19.🧮 Resistors of 10 Ω, 330 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  20. 20.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 Resistors of 20 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 Resistors of 330 Ω, 100 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 A 2.75 V battery is joined to 3 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  25. 25.🧮 Resistors of 150 Ω, 20 Ω, 33 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 Resistors of 470 Ω, 330 Ω, 47 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 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)?
  28. 28.🧮 A 2.8 V battery is joined to 12 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  29. 29.🧮 A 1.1 V battery is joined to 3 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  30. 30.🧮 A 2.2 V battery is joined to 8 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  31. 31.🧮 A 100 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)?
  32. 32.🧮 Resistors of 10 Ω, 50 Ω, 68 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 Resistors of 330 Ω, 22 Ω, 50 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 Resistors of 68 Ω, 50 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 A 330 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.🧮 Resistors of 47 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 A 22 V battery is joined to 12 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  40. 40.🧮 Resistors of 100 Ω, 470 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. 0.2
  2. 10
  3. 30
  4. 157
  5. 50
  6. less than either one
  7. 500
  8. 5
  9. 165
  10. 0.1
  11. 50
  12. 20
  13. 550
  14. bigger
  15. 770
  16. 25
  17. 175
  18. 5
  19. 408
  20. 25
  21. 42
  22. 5
  23. 452
  24. 0.25
  25. 236
  26. 1317
  27. 565
  28. 0.2
  29. 0.1
  30. 0.2
  31. 200
  32. 348
  33. 10
  34. 502
  35. 50
  36. 338
  37. 440
  38. 115
  39. 1
  40. 720

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