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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 452 · 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 10 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  2. 2.🧮 Resistors of 33 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  3. 3.🧮 A 470 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)?
  4. 4.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) bigger (c) stay the same (d) smaller
  5. 5.🧮 Resistors of 150 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  6. 6.🧮 Resistors of 100 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  7. 7.🧮 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)?
  8. 8.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 A 33 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)?
  11. 11.🧮 Resistors of 150 Ω, 22 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  12. 12.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 Two resistors in parallel give a total that is … (a) less than either one (b) their sum (c) always zero (d) more than either one
  14. 14.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 Resistors of 47 Ω, 68 Ω, 50 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 A 470 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)?
  17. 17.🧮 Resistors of 470 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  18. 18.🧮 A 4.5 V battery is joined to 6 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  19. 19.🧮 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)?
  20. 20.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 A 220 Ω resistor is joined in series with two equal 330 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  22. 22.🧮 Resistors of 47 Ω, 68 Ω, 10 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 A 5 V battery is joined to 2 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  24. 24.🧮 Resistors of 50 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 A 5 V battery is joined to 8 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  26. 26.🧮 Resistors of 20 Ω, 100 Ω, 47 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 Resistors of 20 Ω, 10 Ω, 22 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 Resistors of 22 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  29. 29.🧮 Resistors of 22 Ω, 47 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 Resistors of 68 Ω, 33 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 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)?
  33. 33.🧮 Resistors of 10 Ω, 33 Ω, 22 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 A 4.25 V battery is joined to 5 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  36. 36.🧮 Resistors of 47 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 A 5 V battery is joined to 5 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  38. 38.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 An 18 V battery is joined to 6 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  40. 40.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. 105
  2. 503
  3. 970
  4. bigger
  5. 160
  6. 430
  7. 175
  8. 500
  9. 25
  10. 38
  11. 182
  12. 100
  13. less than either one
  14. 100
  15. 233
  16. 475
  17. 940
  18. 0.5
  19. 30
  20. 25
  21. 385
  22. 595
  23. 1
  24. 60
  25. 0.25
  26. 497
  27. 522
  28. 55
  29. 539
  30. 111
  31. 10
  32. 565
  33. 112
  34. 100
  35. 0.25
  36. 147
  37. 0.5
  38. 10
  39. 1
  40. 100

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