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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 890 · 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 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)?
  2. 2.🧮 A 9 V battery is joined to 6 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  3. 3.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  4. 4.🧮 Resistors of 47 Ω, 330 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  5. 5.🧮 A 150 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)?
  6. 6.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 A 4.25 V battery is joined to 12 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  8. 8.🧮 Resistors of 20 Ω, 20 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  9. 9.🧮 A 3 V battery is joined to 2 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  10. 10.🧮 Resistors of 20 Ω, 47 Ω, 47 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 An 8.5 V battery is joined to 5 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  12. 12.🧮 Resistors of 10 Ω, 50 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  13. 13.🧮 Adding another resistor in series makes the total resistance … (a) smaller (b) zero (c) stay the same (d) bigger
  14. 14.🧮 A 68 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.🧮 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)?
  16. 16.🧮 A 3.75 V battery is joined to 5 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  17. 17.🧮 A 22 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)?
  18. 18.🧮 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
  19. 19.🧮 A 1.5 V battery is joined to 3 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  20. 20.🧮 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)?
  21. 21.🧮 A 470 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)?
  22. 22.🧮 A 22 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)?
  23. 23.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  24. 24.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  25. 25.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 A 5.5 V battery is joined to 10 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  27. 27.🧮 Resistors of 68 Ω, 33 Ω, 220 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 Four equal 100 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 Resistors of 10 Ω, 22 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 Resistors of 47 Ω, 150 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 A 16 V battery is joined to 8 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  34. 34.🧮 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)?
  35. 35.🧮 Resistors of 220 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 A 470 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.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 Resistors of 100 Ω, 50 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 A 10 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.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?

Answer key

  1. 43
  2. 0.5
  3. 100
  4. 847
  5. 170
  6. 25
  7. 0.25
  8. 62
  9. 0.5
  10. 136
  11. 0.5
  12. 280
  13. bigger
  14. 178
  15. 480
  16. 0.25
  17. 187
  18. less than either one
  19. 0.25
  20. 42
  21. 490
  22. 122
  23. 100
  24. 20
  25. 20
  26. 0.25
  27. 791
  28. 500
  29. 235
  30. 25
  31. 252
  32. 244
  33. 1
  34. 30
  35. 288
  36. 475
  37. 5
  38. 620
  39. 175
  40. 100

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