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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 398 · 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.

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  1. 1.🧮 A 3.5 V battery is joined to 6 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  2. 2.🧮 A 4 V battery is joined to 2 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  3. 3.🧮 A 2.5 V battery is joined to 3 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  4. 4.🧮 Resistors of 33 Ω, 100 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  5. 5.🧮 Resistors of 470 Ω, 20 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  6. 6.🧮 Resistors of 22 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  7. 7.🧮 Resistors of 220 Ω, 330 Ω, 50 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  8. 8.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 Adding another resistor in series makes the total resistance … (a) smaller (b) stay the same (c) bigger (d) zero
  10. 10.🧮 Two resistors in parallel give a total that is … (a) their sum (b) always zero (c) more than either one (d) less than either one
  11. 11.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 Resistors of 47 Ω, 470 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  13. 13.🧮 Resistors of 33 Ω, 100 Ω, 50 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 A 3 V battery is joined to 10 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  16. 16.🧮 A 2.2 V battery is joined to 12 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  17. 17.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 Resistors of 20 Ω, 10 Ω, 22 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  20. 20.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 Resistors of 47 Ω, 20 Ω, 68 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 A 470 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)?
  23. 23.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 A 2.8 V battery is joined to 12 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  25. 25.🧮 Resistors of 20 Ω, 20 Ω, 20 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 A 1 V battery is joined to 5 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  28. 28.🧮 A 6.5 V battery is joined to 10 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  29. 29.🧮 A 5 V battery is joined to 2 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  30. 30.🧮 Resistors of 47 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 A 1.3 V battery is joined to 10 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  32. 32.🧮 Resistors of 100 Ω, 470 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 A 33 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)?
  36. 36.🧮 A 13 V battery is joined to 3 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  37. 37.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 A 1.1 V battery is joined to 5 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  39. 39.🧮 A 68 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)?
  40. 40.🧮 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)?

Answer key

  1. 0.25
  2. 1
  3. 0.5
  4. 155
  5. 640
  6. 69
  7. 750
  8. 165
  9. bigger
  10. less than either one
  11. 100
  12. 527
  13. 251
  14. 20
  15. 0.2
  16. 0.1
  17. 25
  18. 99
  19. 10
  20. 50
  21. 155
  22. 705
  23. 500
  24. 0.2
  25. 530
  26. 20
  27. 0.1
  28. 0.5
  29. 1
  30. 197
  31. 0.1
  32. 617
  33. 5
  34. 110
  35. 43
  36. 1
  37. 5
  38. 0.1
  39. 233
  40. 110

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