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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 750 · 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.🧮 Five equal 500 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  2. 2.🧮 A 2.75 V battery is joined to 8 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  3. 3.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  4. 4.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 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)?
  6. 6.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 Resistors of 22 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  8. 8.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 Resistors of 68 Ω, 68 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 Resistors of 330 Ω, 20 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 A 150 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)?
  12. 12.🧮 Resistors of 33 Ω, 20 Ω, 10 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  13. 13.🧮 A 20 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)?
  14. 14.🧮 A 1 V battery is joined to 2 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  15. 15.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 A 2.4 V battery is joined to 4 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  17. 17.🧮 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)?
  18. 18.🧮 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
  19. 19.🧮 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)?
  20. 20.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  23. 23.🧮 Adding another resistor in series makes the total resistance … (a) stay the same (b) zero (c) smaller (d) bigger
  24. 24.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  25. 25.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 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)?
  27. 27.🧮 A 20 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)?
  28. 28.🧮 Resistors of 68 Ω, 330 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  29. 29.🧮 A 3 V battery is joined to 2 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  30. 30.🧮 A 10 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)?
  31. 31.🧮 Resistors of 20 Ω, 50 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 A 12 V battery is joined to 2 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  34. 34.🧮 Resistors of 470 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 A 1 V battery is joined to 3 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  36. 36.🧮 Resistors of 10 Ω, 47 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 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)?
  38. 38.🧮 A 2 V battery is joined to 6 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  39. 39.🧮 Resistors of 33 Ω, 20 Ω, 10 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  40. 40.🧮 A 22 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)?

Answer key

  1. 100
  2. 0.25
  3. 50
  4. 5
  5. 580
  6. 10
  7. 492
  8. 25
  9. 356
  10. 820
  11. 650
  12. 85
  13. 185
  14. 0.25
  15. 10
  16. 0.2
  17. 480
  18. less than either one
  19. 30
  20. 10
  21. 165
  22. 25
  23. bigger
  24. 20
  25. 50
  26. 120
  27. 120
  28. 420
  29. 0.5
  30. 15
  31. 120
  32. 5
  33. 1
  34. 570
  35. 0.2
  36. 67
  37. 440
  38. 0.2
  39. 163
  40. 42

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