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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 397 · 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 68 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)?
  2. 2.🧮 A 2.4 V battery is joined to 8 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  3. 3.🧮 Resistors of 330 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  4. 4.🧮 An 11 V battery is joined to 3 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  5. 5.🧮 Resistors of 150 Ω, 330 Ω, 100 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  6. 6.🧮 Adding another resistor in series makes the total resistance … (a) zero (b) stay the same (c) smaller (d) bigger
  7. 7.🧮 A 3.75 V battery is joined to 3 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  8. 8.🧮 Resistors of 100 Ω, 330 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  9. 9.🧮 Resistors of 47 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 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)?
  11. 11.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 A 4 V battery is joined to 12 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  13. 13.🧮 Resistors of 47 Ω, 68 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  14. 14.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 Resistors of 330 Ω, 68 Ω, 220 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 A 50 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)?
  19. 19.🧮 A 0.5 V battery is joined to 2 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  20. 20.🧮 Resistors of 220 Ω, 50 Ω, 20 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  21. 21.🧮 A 150 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)?
  22. 22.🧮 A 150 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)?
  23. 23.🧮 Resistors of 33 Ω, 20 Ω, 330 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  25. 25.🧮 A 330 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 68 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)?
  27. 27.🧮 Two resistors in parallel give a total that is … (a) their sum (b) more than either one (c) always zero (d) less than either one
  28. 28.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 A 2 V battery is joined to 6 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  30. 30.🧮 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)?
  31. 31.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 Three equal 75 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  34. 34.🧮 Resistors of 22 Ω, 330 Ω, 68 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 A 1.4 V battery is joined to 2 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  36. 36.🧮 Resistors of 33 Ω, 10 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 Resistors of 50 Ω, 33 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 A 5 V battery is joined to 12 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  39. 39.🧮 A 4.25 V battery is joined to 5 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  40. 40.🧮 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)?

Answer key

  1. 168
  2. 0.2
  3. 660
  4. 1
  5. 627
  6. bigger
  7. 0.25
  8. 440
  9. 69
  10. 335
  11. 10
  12. 0.2
  13. 162
  14. 25
  15. 628
  16. 165
  17. 5
  18. 55
  19. 0.1
  20. 337
  21. 315
  22. 155
  23. 403
  24. 50
  25. 340
  26. 73
  27. less than either one
  28. 5
  29. 0.25
  30. 30
  31. 50
  32. 100
  33. 25
  34. 453
  35. 0.1
  36. 90
  37. 413
  38. 0.25
  39. 0.25
  40. 175

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