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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 155 · 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 13 V battery is joined to 5 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  3. 3.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  4. 4.🧮 A 2.4 V battery is joined to 6 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  5. 5.🧮 Resistors of 33 Ω, 33 Ω, 47 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  6. 6.🧮 A 1 V battery is joined to 3 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  7. 7.🧮 A 2.8 V battery is joined to 12 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  8. 8.🧮 Resistors of 22 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  9. 9.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 Resistors of 330 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 Resistors of 47 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  12. 12.🧮 A 1.5 V battery is joined to 12 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  13. 13.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 A 2.2 V battery is joined to 3 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  15. 15.🧮 Resistors of 20 Ω, 10 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 Resistors of 470 Ω, 150 Ω, 220 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) stay the same (c) bigger (d) smaller
  19. 19.🧮 Resistors of 220 Ω, 220 Ω, 150 Ω and 100 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 470 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  21. 21.🧮 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)?
  22. 22.🧮 Resistors of 50 Ω, 330 Ω, 10 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 Resistors of 20 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 An 18 V battery is joined to 10 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  25. 25.🧮 Two resistors in parallel give a total that is … (a) more than either one (b) their sum (c) always zero (d) less than either one
  26. 26.🧮 A 100 Ω resistor is joined in series with two equal 470 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  27. 27.🧮 Resistors of 47 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 Resistors of 470 Ω, 47 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  29. 29.🧮 A 20 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)?
  30. 30.🧮 A 1 V battery is joined to 2 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  31. 31.🧮 A 150 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)?
  32. 32.🧮 Resistors of 470 Ω, 470 Ω, 68 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 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)?
  35. 35.🧮 Resistors of 50 Ω, 22 Ω, 20 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 A 20 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)?
  37. 37.🧮 A 4.5 V battery is joined to 4 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  38. 38.🧮 Resistors of 330 Ω, 150 Ω, 470 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  40. 40.🧮 Resistors of 470 Ω, 220 Ω, 20 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. 100
  2. 1
  3. 110
  4. 0.2
  5. 333
  6. 0.2
  7. 0.2
  8. 172
  9. 5
  10. 340
  11. 94
  12. 0.1
  13. 20
  14. 0.2
  15. 52
  16. 908
  17. 50
  18. bigger
  19. 690
  20. 257
  21. 35
  22. 412
  23. 53
  24. 1
  25. less than either one
  26. 335
  27. 517
  28. 539
  29. 130
  30. 0.2
  31. 260
  32. 1018
  33. 100
  34. 480
  35. 142
  36. 25
  37. 0.5
  38. 1420
  39. 5
  40. 860

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