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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 516 · 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 100 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)?
  2. 2.🧮 Resistors of 33 Ω, 10 Ω, 20 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  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.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  5. 5.🧮 A 1.8 V battery is joined to 4 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  6. 6.🧮 Resistors of 100 Ω, 220 Ω and 220 Ω are joined in series. What is the total resistance (in ohms)?
  7. 7.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 Two resistors in parallel give a total that is … (a) more than either one (b) always zero (c) their sum (d) less than either one
  9. 9.🧮 Resistors of 330 Ω, 100 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  10. 10.🧮 Adding another resistor in series makes the total resistance … (a) stay the same (b) smaller (c) zero (d) bigger
  11. 11.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  12. 12.🧮 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)?
  13. 13.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 A 2.5 V battery is joined to 5 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  15. 15.🧮 A 1.8 V battery is joined to 3 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  16. 16.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  17. 17.🧮 Resistors of 20 Ω, 150 Ω, 20 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  18. 18.🧮 A 47 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 47 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)?
  20. 20.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  21. 21.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 A 330 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)?
  23. 23.🧮 Resistors of 68 Ω, 20 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 Two equal 330 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  25. 25.🧮 Resistors of 20 Ω, 22 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  26. 26.🧮 Resistors of 50 Ω, 33 Ω, 47 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  27. 27.🧮 Resistors of 22 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 Three equal 300 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 A 68 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)?
  30. 30.🧮 A 47 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)?
  31. 31.🧮 A 4.5 V battery is joined to 12 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  32. 32.🧮 Four equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 Resistors of 330 Ω, 100 Ω, 220 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  34. 34.🧮 A 33 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)?
  35. 35.🧮 Resistors of 22 Ω, 22 Ω, 330 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  36. 36.🧮 Resistors of 20 Ω, 22 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  37. 37.🧮 Resistors of 20 Ω, 68 Ω, 20 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 Resistors of 20 Ω, 150 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 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)?
  40. 40.🧮 A 0.4 V battery is joined to 2 Ω and 2 Ω resistors in series. What current flows (in amperes)? =

Answer key

  1. 600
  2. 110
  3. 0.5
  4. 50
  5. 0.2
  6. 540
  7. 5
  8. less than either one
  9. 452
  10. bigger
  11. 10
  12. 175
  13. 5
  14. 0.25
  15. 0.2
  16. 100
  17. 520
  18. 52
  19. 57
  20. 25
  21. 100
  22. 380
  23. 121
  24. 165
  25. 52
  26. 198
  27. 32
  28. 100
  29. 78
  30. 67
  31. 0.25
  32. 5
  33. 670
  34. 268
  35. 442
  36. 92
  37. 438
  38. 203
  39. 335
  40. 0.1

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