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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 157 · 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.🧮 Two resistors in parallel give a total that is … (a) their sum (b) more than either one (c) less than either one (d) always zero
  2. 2.🧮 Adding another resistor in series makes the total resistance … (a) bigger (b) stay the same (c) zero (d) smaller
  3. 3.🧮 Resistors of 220 Ω, 470 Ω, 330 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  4. 4.🧮 A 47 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)?
  5. 5.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  6. 6.🧮 Resistors of 150 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  7. 7.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 Resistors of 330 Ω, 20 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 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)?
  14. 14.🧮 Resistors of 470 Ω, 50 Ω, 150 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  15. 15.🧮 A 4.8 V battery is joined to 12 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  16. 16.🧮 Resistors of 22 Ω, 68 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 A 9 V battery is joined to 6 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  19. 19.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 A 330 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)?
  21. 21.🧮 A 100 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)?
  22. 22.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 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)?
  24. 24.🧮 A 10 V battery is joined to 8 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  25. 25.🧮 A 220 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)?
  26. 26.🧮 Resistors of 20 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  28. 28.🧮 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)?
  29. 29.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 A 2 V battery is joined to 10 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  31. 31.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 Resistors of 10 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 A 10 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)?
  35. 35.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 Resistors of 33 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 Resistors of 68 Ω, 150 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  40. 40.🧮 Resistors of 10 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. less than either one
  2. bigger
  3. 1170
  4. 212
  5. 5
  6. 160
  7. 25
  8. 10
  9. 397
  10. 500
  11. 20
  12. 10
  13. 830
  14. 720
  15. 0.2
  16. 110
  17. 0.5
  18. 20
  19. 100
  20. 355
  21. 210
  22. 20
  23. 240
  24. 0.5
  25. 320
  26. 490
  27. 25
  28. 30
  29. 100
  30. 0.1
  31. 5
  32. 43
  33. 110
  34. 510
  35. 100
  36. 165
  37. 53
  38. 438
  39. 50
  40. 230

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