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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 466 · 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.🧮 Resistors of 50 Ω, 470 Ω, 68 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  2. 2.🧮 A 20 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)?
  3. 3.🧮 A 6.5 V battery is joined to 3 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  4. 4.🧮 Resistors of 47 Ω, 470 Ω, 10 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  5. 5.🧮 A 6 V battery is joined to 8 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  6. 6.🧮 Two resistors in parallel give a total that is … (a) less than either one (b) always zero (c) their sum (d) more than either one
  7. 7.🧮 Resistors of 68 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  8. 8.🧮 Adding another resistor in series makes the total resistance … (a) smaller (b) zero (c) bigger (d) stay the same
  9. 9.🧮 Resistors of 20 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 A 68 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)?
  12. 12.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  13. 13.🧮 Resistors of 10 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 Resistors of 220 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  15. 15.🧮 Resistors of 50 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 Resistors of 330 Ω, 68 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  19. 19.🧮 A 7 V battery is joined to 4 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  20. 20.🧮 Two equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 A 220 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)?
  22. 22.🧮 Resistors of 330 Ω, 68 Ω, 100 Ω and 330 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.🧮 Resistors of 68 Ω, 10 Ω, 150 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  25. 25.🧮 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)?
  26. 26.🧮 A 1.4 V battery is joined to 2 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  27. 27.🧮 A 2.25 V battery is joined to 3 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  28. 28.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 Resistors of 47 Ω, 330 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 Resistors of 220 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 A 15 V battery is joined to 5 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  34. 34.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 Resistors of 22 Ω, 10 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 A 100 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.🧮 Resistors of 50 Ω, 47 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 A 4 V battery is joined to 6 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  40. 40.🧮 A 330 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)?

Answer key

  1. 621
  2. 520
  3. 0.5
  4. 997
  5. 0.5
  6. less than either one
  7. 168
  8. bigger
  9. 88
  10. 500
  11. 118
  12. 100
  13. 110
  14. 320
  15. 520
  16. 448
  17. 110
  18. 25
  19. 0.5
  20. 50
  21. 320
  22. 828
  23. 53
  24. 278
  25. 43
  26. 0.2
  27. 0.25
  28. 20
  29. 25
  30. 399
  31. 240
  32. 25
  33. 1
  34. 5
  35. 502
  36. 105
  37. 117
  38. 165
  39. 0.5
  40. 565

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