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Electronics Worksheet: Series and Parallel Resistors

Electronics lesson 14: Resistors in series and parallel · Set 309 · 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 6 V battery is joined to 4 Ω and 2 Ω resistors in series. What current flows (in amperes)? =
  2. 2.🧮 Adding another resistor in series makes the total resistance … (a) stay the same (b) smaller (c) zero (d) bigger
  3. 3.🧮 A 1.7 V battery is joined to 5 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  4. 4.🧮 A 1.1 V battery is joined to 3 Ω and 8 Ω resistors in series. What current flows (in amperes)? =
  5. 5.🧮 A 10 V battery is joined to 10 Ω and 10 Ω resistors in series. What current flows (in amperes)? =
  6. 6.🧮 Five equal 25 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  7. 7.🧮 An 8 V battery is joined to 5 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  8. 8.🧮 Resistors of 68 Ω, 33 Ω and 50 Ω are joined in series. What is the total resistance (in ohms)?
  9. 9.🧮 An 18 V battery is joined to 6 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  10. 10.🧮 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)?
  11. 11.🧮 Two equal 10 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 50 Ω resistors that are in parallel with each other. What is the total resistance (in ohms)?
  13. 13.🧮 Four equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  14. 14.🧮 A 100 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)?
  15. 15.🧮 Two equal 1000 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  16. 16.🧮 A 33 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)?
  17. 17.🧮 Five equal 250 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  18. 18.🧮 Three equal 15 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  19. 19.🧮 A 0.7 V battery is joined to 2 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  20. 20.🧮 A 47 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)?
  21. 21.🧮 Two equal 470 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  22. 22.🧮 Resistors of 150 Ω, 68 Ω, 22 Ω and 47 Ω are joined in series. What is the total resistance (in ohms)?
  23. 23.🧮 A 22 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)?
  24. 24.🧮 Two resistors in parallel give a total that is … (a) always zero (b) their sum (c) more than either one (d) less than either one
  25. 25.🧮 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)?
  26. 26.🧮 A 1.6 V battery is joined to 3 Ω and 5 Ω resistors in series. What current flows (in amperes)? =
  27. 27.🧮 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)?
  28. 28.🧮 Resistors of 10 Ω, 10 Ω and 330 Ω are joined in series. What is the total resistance (in ohms)?
  29. 29.🧮 Four equal 400 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  30. 30.🧮 Resistors of 20 Ω, 50 Ω, 22 Ω and 33 Ω are joined in series. What is the total resistance (in ohms)?
  31. 31.🧮 A 3 V battery is joined to 3 Ω and 12 Ω resistors in series. What current flows (in amperes)? =
  32. 32.🧮 A 330 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)?
  33. 33.🧮 A 9 V battery is joined to 6 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  34. 34.🧮 Resistors of 150 Ω and 10 Ω are joined in series. What is the total resistance (in ohms)?
  35. 35.🧮 A 1.6 V battery is joined to 5 Ω and 3 Ω resistors in series. What current flows (in amperes)? =
  36. 36.🧮 Two equal 200 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  37. 37.🧮 Four equal 80 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  38. 38.🧮 Two equal 40 Ω resistors are joined in parallel. What is the total resistance (in ohms)?
  39. 39.🧮 A 20 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 0.7 V battery is joined to 3 Ω and 4 Ω resistors in series. What current flows (in amperes)? =

Answer key

  1. 1
  2. bigger
  3. 0.1
  4. 0.1
  5. 0.5
  6. 5
  7. 1
  8. 151
  9. 1
  10. 245
  11. 5
  12. 35
  13. 50
  14. 125
  15. 500
  16. 58
  17. 50
  18. 5
  19. 0.1
  20. 157
  21. 235
  22. 287
  23. 27
  24. less than either one
  25. 93
  26. 0.2
  27. 970
  28. 350
  29. 100
  30. 125
  31. 0.2
  32. 430
  33. 1
  34. 160
  35. 0.2
  36. 100
  37. 20
  38. 20
  39. 25
  40. 0.1

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