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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 163 · 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.🧮 Adding another resistor in series makes the total resistance … (a) smaller (b) zero (c) bigger (d) stay the same
  2. 2.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  3. 3.🧮 Resistors of 33 Ω, 20 Ω, 22 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  4. 4.🧮 Resistors of 150 Ω, 47 Ω, 47 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  5. 5.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  6. 6.🧮 A 47 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)?
  7. 7.🧮 Resistors of 50 Ω, 68 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  8. 8.🧮 Resistors of 330 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  9. 9.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 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)?
  11. 11.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 Two resistors in parallel give a total that is … (a) more than either one (b) less than either one (c) their sum (d) always zero
  13. 13.🧮 Resistors of 22 Ω, 68 Ω, 68 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 Resistors of 22 Ω, 220 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  15. 15.🧮 Resistors of 50 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 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)?
  18. 18.🧮 A 12 V battery is joined to 6 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  19. 19.🧮 A 470 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)?
  20. 20.🧮 Resistors of 33 Ω, 33 Ω, 20 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  21. 21.🧮 A 100 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)?
  22. 22.🧮 A 20 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.🧮 Resistors of 470 Ω, 50 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 Resistors of 10 Ω, 50 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 Resistors of 50 Ω, 33 Ω, 68 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 A 33 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)?
  27. 27.🧮 Resistors of 68 Ω, 47 Ω and 33 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 150 Ω, 50 Ω, 330 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 Resistors of 330 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 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)?
  33. 33.🧮 A 68 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)?
  34. 34.🧮 A 5.5 V battery is joined to 8 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  35. 35.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 Resistors of 47 Ω, 50 Ω, 47 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  40. 40.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. bigger
  2. 20
  3. 108
  4. 294
  5. 50
  6. 67
  7. 268
  8. 350
  9. 100
  10. 27
  11. 5
  12. less than either one
  13. 168
  14. 252
  15. 70
  16. 165
  17. 35
  18. 1
  19. 480
  20. 186
  21. 600
  22. 45
  23. 530
  24. 390
  25. 219
  26. 143
  27. 148
  28. 55
  29. 550
  30. 363
  31. 100
  32. 110
  33. 73
  34. 0.5
  35. 50
  36. 100
  37. 500
  38. 364
  39. 10
  40. 5

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