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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 179 · 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) smaller (c) zero (d) stay the same
  2. 2.🧮 A 0.7 V battery is joined to 5 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  3. 3.🧮 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)?
  4. 4.🧮 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)?
  5. 5.🧮 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)?
  6. 6.🧮 A 1.75 V battery is joined to 3 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  7. 7.🧮 Two equal 10 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  8. 8.🧮 A 14 V battery is joined to 12 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  9. 9.🧮 Four equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  10. 10.🧮 Resistors of 470 Ω, 47 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  11. 11.🧮 A 1.8 V battery is joined to 5 Ω and 4 Ω resistors in series. What current flows (in amperes)? =
  12. 12.🧮 Two resistors in parallel give a total that is … (a) their sum (b) less than either one (c) always zero (d) more than either one
  13. 13.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 Three equal 150 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  15. 15.🧮 Resistors of 150 Ω, 220 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  16. 16.🧮 Resistors of 68 Ω and 100 Ω are joined in series. What is the total resistance (in ohms)?
  17. 17.🧮 Five equal 125 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 Resistors of 10 Ω, 150 Ω, 20 Ω and 22 Ω are joined in series. What is the total resistance (in ohms)?
  19. 19.🧮 Resistors of 22 Ω and 470 Ω are joined in series. What is the total resistance (in ohms)?
  20. 20.🧮 Resistors of 150 Ω, 470 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  21. 21.🧮 A 470 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)?
  22. 22.🧮 An 11 V battery is joined to 5 Ω and 6 Ω resistors in series. What current flows (in amperes)? =
  23. 23.🧮 Resistors of 68 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  24. 24.🧮 A 20 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)?
  25. 25.🧮 Two equal 20 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  26. 26.🧮 Two equal 50 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  27. 27.🧮 Resistors of 50 Ω, 150 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  28. 28.🧮 A 1.4 V battery is joined to 4 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  29. 29.🧮 Three equal 60 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 Three equal 30 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  31. 31.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  32. 32.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  33. 33.🧮 A 5.5 V battery is joined to 3 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  34. 34.🧮 Resistors of 50 Ω, 22 Ω and 20 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 A 2 V battery is joined to 3 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  36. 36.🧮 A 68 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)?
  37. 37.🧮 A 20 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)?
  38. 38.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 Resistors of 100 Ω and 68 Ω are joined in series. What is the total resistance (in ohms)?
  40. 40.🧮 A 10 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)?

Answer key

  1. bigger
  2. 0.1
  3. 200
  4. 67
  5. 122
  6. 0.25
  7. 5
  8. 1
  9. 10
  10. 527
  11. 0.2
  12. less than either one
  13. 235
  14. 50
  15. 840
  16. 168
  17. 25
  18. 202
  19. 492
  20. 667
  21. 580
  22. 1
  23. 115
  24. 255
  25. 10
  26. 25
  27. 220
  28. 0.2
  29. 20
  30. 10
  31. 5
  32. 5
  33. 0.5
  34. 92
  35. 0.25
  36. 93
  37. 185
  38. 50
  39. 168
  40. 60

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