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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 687 · 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 1.6 V battery is joined to 5 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  2. 2.🧮 A 2.5 V battery is joined to 8 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  3. 3.🧮 Two resistors in parallel give a total that is … (a) always zero (b) less than either one (c) more than either one (d) their sum
  4. 4.🧮 A 10 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)?
  5. 5.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  6. 6.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 Resistors of 50 Ω, 47 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  8. 8.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  9. 9.🧮 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)?
  10. 10.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  11. 11.🧮 Resistors of 330 Ω, 68 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  12. 12.🧮 Adding another resistor in series makes the total resistance … (a) bigger (b) zero (c) stay the same (d) smaller
  13. 13.🧮 A 10 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)?
  14. 14.🧮 Resistors of 220 Ω, 150 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  15. 15.🧮 Resistors of 47 Ω and 150 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 Resistors of 100 Ω, 100 Ω, 50 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 Resistors of 33 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  18. 18.🧮 Resistors of 33 Ω, 10 Ω, 220 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 A 10 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)?
  20. 20.🧮 A 220 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)?
  21. 21.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 Resistors of 20 Ω, 47 Ω, 100 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 A 1.5 V battery is joined to 3 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  24. 24.🧮 A 220 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)?
  25. 25.🧮 A 220 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)?
  26. 26.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 Five equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  28. 28.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  29. 29.🧮 Resistors of 150 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  30. 30.🧮 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)?
  31. 31.🧮 Resistors of 47 Ω, 33 Ω, 100 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  32. 32.🧮 Resistors of 50 Ω, 50 Ω, 330 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  33. 33.🧮 A 150 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)?
  34. 34.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  35. 35.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  36. 36.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 Resistors of 100 Ω, 10 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  38. 38.🧮 Resistors of 10 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  39. 39.🧮 A 7 V battery is joined to 5 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  40. 40.🧮 A 20 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)?

Answer key

  1. 0.2
  2. 0.25
  3. less than either one
  4. 510
  5. 235
  6. 25
  7. 567
  8. 5
  9. 155
  10. 100
  11. 445
  12. bigger
  13. 20
  14. 390
  15. 197
  16. 720
  17. 80
  18. 285
  19. 245
  20. 720
  21. 100
  22. 214
  23. 0.25
  24. 240
  25. 245
  26. 20
  27. 10
  28. 5
  29. 197
  30. 520
  31. 650
  32. 440
  33. 200
  34. 20
  35. 50
  36. 500
  37. 178
  38. 340
  39. 1
  40. 130

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