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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 688 · 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.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 Resistors of 50 Ω, 220 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  3. 3.🧮 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)?
  4. 4.🧮 Five equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  6. 6.🧮 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
  7. 7.🧮 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)?
  8. 8.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) stay the same (c) bigger (d) smaller
  9. 9.🧮 Resistors of 33 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 A 2.25 V battery is joined to 3 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  13. 13.🧮 Resistors of 47 Ω, 470 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 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)?
  15. 15.🧮 Resistors of 33 Ω, 22 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 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)?
  19. 19.🧮 Resistors of 50 Ω, 470 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  20. 20.🧮 A 22 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)?
  21. 21.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 A 1 V battery is joined to 2 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  23. 23.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  25. 25.🧮 A 50 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)?
  26. 26.🧮 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)?
  27. 27.🧮 Resistors of 470 Ω, 68 Ω, 50 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 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)?
  29. 29.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 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)?
  31. 31.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 Resistors of 20 Ω, 150 Ω, 68 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 A 2.6 V battery is joined to 3 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  35. 35.🧮 Three equal 30 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.🧮 A 1 V battery is joined to 6 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  38. 38.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 A 14 V battery is joined to 6 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  40. 40.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. 20
  2. 740
  3. 70
  4. 20
  5. 100
  6. less than either one
  7. 120
  8. bigger
  9. 43
  10. 10
  11. 235
  12. 0.25
  13. 527
  14. 580
  15. 105
  16. 110
  17. 100
  18. 150
  19. 540
  20. 522
  21. 100
  22. 0.1
  23. 50
  24. 25
  25. 160
  26. 510
  27. 598
  28. 60
  29. 5
  30. 265
  31. 25
  32. 50
  33. 285
  34. 0.2
  35. 10
  36. 165
  37. 0.1
  38. 5
  39. 1
  40. 50

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