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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 446 · 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.

NameDateTime takenScore ___ / 40
  1. 1.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 Resistors of 220 Ω, 20 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  4. 4.🧮 A 50 Ω resistor is joined in series with two equal 100 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  5. 5.🧮 Adding another resistor in series makes the total resistance … (a) bigger (b) zero (c) smaller (d) stay the same
  6. 6.🧮 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)?
  7. 7.🧮 A 150 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)?
  8. 8.🧮 A 68 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)?
  9. 9.🧮 A 68 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)?
  10. 10.🧮 Two resistors in parallel give a total that is … (a) less than either one (b) always zero (c) their sum (d) more than either one
  11. 11.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 A 10 Ω resistor is joined in series with two equal 100 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  13. 13.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 A 2 V battery is joined to 8 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  17. 17.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  19. 19.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 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)?
  21. 21.🧮 A 220 Ω resistor is joined in series with two equal 100 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  22. 22.🧮 Resistors of 20 Ω, 470 Ω, 68 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 Resistors of 470 Ω, 50 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 Resistors of 470 Ω, 470 Ω, 47 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  28. 28.🧮 Resistors of 100 Ω, 150 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  29. 29.🧮 A 330 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)?
  30. 30.🧮 A 100 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)?
  31. 31.🧮 Resistors of 10 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 A 0.9 V battery is joined to 3 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  34. 34.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 Resistors of 470 Ω, 20 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 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)?
  37. 37.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 A 22 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)?
  39. 39.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  40. 40.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. 10
  2. 165
  3. 308
  4. 100
  5. bigger
  6. 440
  7. 160
  8. 168
  9. 78
  10. less than either one
  11. 50
  12. 60
  13. 500
  14. 5
  15. 20
  16. 0.1
  17. 50
  18. 5
  19. 20
  20. 225
  21. 270
  22. 1028
  23. 540
  24. 1457
  25. 10
  26. 5
  27. 20
  28. 470
  29. 495
  30. 110
  31. 43
  32. 100
  33. 0.1
  34. 25
  35. 710
  36. 510
  37. 50
  38. 47
  39. 100
  40. 100

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