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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 128 · 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 7.5 V battery is joined to 10 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  2. 2.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  4. 4.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 Adding another resistor in series makes the total resistance … (a) stay the same (b) bigger (c) zero (d) smaller
  6. 6.🧮 A 1.25 V battery is joined to 3 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  7. 7.🧮 Resistors of 10 Ω, 100 Ω, 47 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  8. 8.🧮 Two resistors in parallel give a total that is … (a) more than either one (b) their sum (c) less than either one (d) always zero
  9. 9.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 A 16 V battery is joined to 6 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  11. 11.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 An 11 V battery is joined to 12 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  13. 13.🧮 Resistors of 20 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 A 150 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)?
  15. 15.🧮 Resistors of 10 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 Resistors of 50 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 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)?
  18. 18.🧮 A 100 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)?
  19. 19.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 Resistors of 330 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 A 50 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)?
  23. 23.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  25. 25.🧮 Resistors of 10 Ω, 220 Ω, 47 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 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)?
  27. 27.🧮 Resistors of 330 Ω, 220 Ω, 100 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 A 5 V battery is joined to 3 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  30. 30.🧮 A 22 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)?
  31. 31.🧮 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)?
  32. 32.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 A 33 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)?
  34. 34.🧮 Five 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 40 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  36. 36.🧮 Resistors of 47 Ω, 100 Ω, 150 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 Resistors of 68 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 Resistors of 150 Ω, 220 Ω, 20 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 A 22 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.🧮 Resistors of 330 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. 0.5
  2. 25
  3. 25
  4. 20
  5. bigger
  6. 0.25
  7. 307
  8. less than either one
  9. 25
  10. 1
  11. 235
  12. 0.5
  13. 67
  14. 250
  15. 60
  16. 72
  17. 705
  18. 335
  19. 100
  20. 50
  21. 550
  22. 75
  23. 50
  24. 5
  25. 497
  26. 120
  27. 697
  28. 20
  29. 1
  30. 257
  31. 340
  32. 10
  33. 268
  34. 20
  35. 350
  36. 344
  37. 78
  38. 490
  39. 522
  40. 352

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