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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 31 · 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.🧮 Adding another resistor in series makes the total resistance … (a) bigger (b) stay the same (c) zero (d) smaller
  2. 2.🧮 A 470 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.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  4. 4.🧮 Two resistors in parallel give a total that is … (a) more than either one (b) their sum (c) less than either one (d) always zero
  5. 5.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  6. 6.🧮 A 10 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)?
  7. 7.🧮 Resistors of 50 Ω, 68 Ω, 20 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  8. 8.🧮 A 0.6 V battery is joined to 2 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  9. 9.🧮 Resistors of 10 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 A 330 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)?
  12. 12.🧮 A 50 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)?
  13. 13.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 Resistors of 150 Ω, 10 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 A 4.5 V battery is joined to 5 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  17. 17.🧮 A 3 V battery is joined to 4 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  18. 18.🧮 Resistors of 150 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 Resistors of 22 Ω, 470 Ω, 10 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  20. 20.🧮 A 220 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.🧮 Resistors of 33 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  22. 22.🧮 A 2.5 V battery is joined to 2 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  23. 23.🧮 An 8 V battery is joined to 12 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  24. 24.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  25. 25.🧮 A 2.2 V battery is joined to 8 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  26. 26.🧮 Resistors of 22 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 Two equal 220 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  28. 28.🧮 A 33 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)?
  29. 29.🧮 A 22 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)?
  30. 30.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 A 9 V battery is joined to 12 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  33. 33.🧮 Resistors of 150 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 A 50 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)?
  35. 35.🧮 Resistors of 100 Ω, 50 Ω, 10 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 A 50 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)?
  38. 38.🧮 A 50 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)?
  39. 39.🧮 Resistors of 10 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  40. 40.🧮 Resistors of 470 Ω, 68 Ω, 150 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?

Answer key

  1. bigger
  2. 970
  3. 25
  4. less than either one
  5. 20
  6. 110
  7. 288
  8. 0.1
  9. 78
  10. 5
  11. 335
  12. 285
  13. 5
  14. 5
  15. 210
  16. 0.5
  17. 0.5
  18. 160
  19. 512
  20. 455
  21. 43
  22. 0.5
  23. 0.5
  24. 10
  25. 0.2
  26. 55
  27. 110
  28. 53
  29. 72
  30. 235
  31. 5
  32. 0.5
  33. 300
  34. 215
  35. 193
  36. 10
  37. 75
  38. 550
  39. 20
  40. 908

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