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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 677 · 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.🧮 A 330 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)?
  2. 2.🧮 Two resistors in parallel give a total that is … (a) always zero (b) more than either one (c) their sum (d) less than either one
  3. 3.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) stay the same (c) smaller (d) bigger
  4. 4.🧮 Resistors of 47 Ω, 68 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  5. 5.🧮 Resistors of 330 Ω, 10 Ω, 10 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  6. 6.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 A 20 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)?
  8. 8.🧮 Resistors of 68 Ω, 100 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  9. 9.🧮 A 3.5 V battery is joined to 8 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  10. 10.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 Resistors of 100 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  12. 12.🧮 Resistors of 470 Ω, 22 Ω, 33 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  13. 13.🧮 Two equal 200 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 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 A 470 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)?
  17. 17.🧮 Resistors of 68 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  18. 18.🧮 Resistors of 22 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 Resistors of 330 Ω, 47 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  21. 21.🧮 Resistors of 22 Ω, 20 Ω, 33 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 A 100 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)?
  23. 23.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 A 50 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)?
  25. 25.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 Five equal 50 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.🧮 Resistors of 68 Ω, 220 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  29. 29.🧮 Resistors of 50 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 A 1.5 V battery is joined to 3 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  31. 31.🧮 Resistors of 68 Ω, 68 Ω, 50 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 A 2.25 V battery is joined to 4 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  33. 33.🧮 A 1.2 V battery is joined to 10 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  34. 34.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 Resistors of 33 Ω, 68 Ω, 68 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 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)?
  38. 38.🧮 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)?
  39. 39.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  40. 40.🧮 A 150 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)?

Answer key

  1. 430
  2. less than either one
  3. bigger
  4. 135
  5. 370
  6. 10
  7. 70
  8. 190
  9. 0.25
  10. 20
  11. 250
  12. 675
  13. 100
  14. 5
  15. 5
  16. 580
  17. 90
  18. 90
  19. 50
  20. 387
  21. 175
  22. 265
  23. 50
  24. 55
  25. 165
  26. 10
  27. 25
  28. 298
  29. 72
  30. 0.1
  31. 254
  32. 0.25
  33. 0.1
  34. 20
  35. 500
  36. 216
  37. 100
  38. 120
  39. 100
  40. 250

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