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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 59 · 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.🧮 Resistors of 22 Ω, 330 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  2. 2.🧮 Resistors of 10 Ω, 22 Ω, 50 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  3. 3.🧮 Two resistors in parallel give a total that is … (a) always zero (b) less than either one (c) their sum (d) more than either one
  4. 4.🧮 A 10 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)?
  5. 5.🧮 A 22 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)?
  6. 6.🧮 Resistors of 150 Ω, 150 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  7. 7.🧮 A 10 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.🧮 Adding another resistor in series makes the total resistance … (a) smaller (b) zero (c) stay the same (d) bigger
  9. 9.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 Resistors of 100 Ω, 50 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 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)?
  12. 12.🧮 Resistors of 47 Ω, 22 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  13. 13.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 A 50 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)?
  17. 17.🧮 A 330 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)?
  18. 18.🧮 A 3 V battery is joined to 12 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  19. 19.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 A 10 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)?
  21. 21.🧮 An 8 V battery is joined to 8 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  22. 22.🧮 An 8 V battery is joined to 4 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  23. 23.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  25. 25.🧮 Resistors of 50 Ω, 330 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  28. 28.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 A 220 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.🧮 A 220 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)?
  31. 31.🧮 A 50 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.🧮 A 220 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)?
  33. 33.🧮 Resistors of 150 Ω, 470 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 Resistors of 330 Ω, 47 Ω, 220 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 Resistors of 220 Ω, 20 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 Resistors of 100 Ω, 33 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  40. 40.🧮 A 3.75 V battery is joined to 10 Ω and 5 Ω resistors in series. What current flows (in amperes)? =

Answer key

  1. 399
  2. 150
  3. less than either one
  4. 15
  5. 27
  6. 333
  7. 35
  8. bigger
  9. 100
  10. 170
  11. 550
  12. 399
  13. 10
  14. 20
  15. 20
  16. 150
  17. 830
  18. 0.2
  19. 20
  20. 120
  21. 0.5
  22. 0.5
  23. 5
  24. 50
  25. 480
  26. 50
  27. 25
  28. 25
  29. 330
  30. 225
  31. 60
  32. 240
  33. 630
  34. 5
  35. 5
  36. 665
  37. 460
  38. 201
  39. 5
  40. 0.25

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